Assertion: sequence's value | /r/HasProperty | omitted in older books
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Source sentences:
text: In some older books, the value F 0 = 0 {\displaystyle F_{0}=0} is omitted, so that the sequence starts with F 1 = F 2 = 1 , {\displaystyle F_{1}=F_{2}=1,} and the recurrence F n