A249718 The largest prime whose square divides the first nonsquarefree number on row n of Pascal's triangle, 1 if all terms on that row are squarefree.

1, 1, 1, 1, 2, 1, 2, 1, 2, 3, 3, 1, 2, 3, 2, 3, 2, 2, 3, 3, 2, 3, 2, 1, 2, 5, 5, 3, 2, 3, 2, 3, 2, 2, 2, 2, 3, 3, 2, 3, 2, 2, 2, 3, 2, 3, 3, 3, 2, 7, 5, 5, 2, 5, 3, 3, 2, 2, 2, 3, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 2, 5, 2, 5, 2, 3, 2, 3, 3, 3, 2, 3, 2, 3, 2, 2, 3, 3, 2, 3, 2, 3, 2, 2, 7, 3, 5, 5, 5, 5, 2, 2, 2, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 3, 3, 3, 2

Offset: 0

Author

Antti Karttunen, Nov 04 2014

Keywords

• nonn

Crossrefs

Cf. A249716, A249740.

Differs from A249717 for the first time at n=36, where a(36) = 3, while A249717(36) = 2.

Programs

Scheme

(define (A249718 n) (A249740 (A249716 n)))

Formula

a(n) = A249740(A249716(n)).