Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Tie no | Home team | Score | Away team | Date |
| --- | --- | --- | --- | --- |
| 1 | Bristol City | 2–1 | Blackburn Rovers | 6 January 1951 |
| 2 | Rochdale | 2–3 | Chelsea | 9 January 1951 |
| 3 | Leicester City | 0–3 | Preston North End | 6 January 1951 |
| 4 | Notts County | 3–4 | Southampton | 6 January 1951 |
| 5 | Aston Villa | 2–0 | Burnley | 6 January 1951 |
| 6 | Bolton Wanderers | 2–0 | York City | 6 January 1951 |
| 7 | Grimsby Town | 3–3 | Exeter City | 6 January 1951 |
| Replay | Exeter City | 4–2 | Grimsby Town | 10 January 1951 |
| 8 | Sunderland | 2–0 | Coventry City | 6 January 1951 |
| 9 | Derby County | 2–2 | West Bromwich Albion | 6 January 1951 |
| Replay | West Bromwich Albion | 0–1 | Derby County | 10 January 1951 |
| 10 | Luton Town | 2–0 | Portsmouth | 6 January 1951 |
| 11 | Sheffield United | 1–0 | Gateshead | 6 January 1951 |
| 12 | Stockport County | 2–1 | Brentford | 6 January 1951 |
| 13 | Newcastle United | 4–1 | Bury | 6 January 1951 |
| 14 | Queens Park Rangers | 3–4 | Millwall | 6 January 1951 |
| 15 | Fulham | 1–0 | Sheffield Wednesday | 6 January 1951 |
| 16 | Bristol Rovers | 5–1 | Aldershot | 10 January 1951 |
| 17 | Northampton Town | 3–1 | Barnsley | 6 January 1951 |
| 18 | West Ham United | 2–1 | Cardiff City | 6 January 1951 |
| 19 | Brighton & Hove Albion | 2–1 | Chesterfield | 6 January 1951 |
| 20 | Manchester United | 4–1 | Oldham Athletic | 6 January 1951 |
| 21 | Norwich City | 3–1 | Liverpool | 6 January 1951 |
| 22 | Plymouth Argyle | 1–2 | Wolverhampton Wanderers | 6 January 1951 |
| 23 | Hull City | 2–0 | Everton | 6 January 1951 |
| 24 | Huddersfield Town | 2–0 | Tottenham Hotspur | 6 January 1951 |
| 25 | Mansfield Town | 2–0 | Swansea Town | 6 January 1951 |
| 26 | Newport County | 3–2 | Reading | 6 January 1951 |
| 27 | Charlton Athletic | 2–2 | Blackpool | 6 January 1951 |
| Replay | Blackpool | 3–0 | Charlton Athletic | 10 January 1951 |
| 28 | Arsenal | 0–0 | Carlisle United | 6 January 1951 |
| Replay | Carlisle United | 1–4 | Arsenal | 11 January 1951 |
| 29 | Leeds United | 1–0 | Middlesbrough | 6 January 1951 |
| 30 | Stoke City | 2–2 | Port Vale | 6 January 1951 |
| Replay | Port Vale | 0–1 | Stoke City | 8 January 1951 |
| 31 | Rotherham United | 2–1 | Doncaster Rovers | 6 January 1951 |
| 32 | Birmingham City | 2–0 | Manchester City | 6 January 1951 |
Question:
What is the Tie Number when Barnsley was the away team?
Answer:
17.0