failing test for the first few pentagonal numbers
first few pentagonal numbers
failing test for seeing if a polynomial has a natural root
seems more idomatic
make the tests pass
code and (passing!) tests
first failing test
more verbose but much better errors
code for working out if a number is pentagonal
function for making quadratic functions
move the triangle and pentagonal number stuff together
rename test
rename triangle? -> triangle-word?
do triangle numbers in a similar way to pentagonal ones
start to macro up
Merge branch 'master' of https://github.com/hairybreeches/euler