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A249717 The smallest prime whose square divides the first nonsquarefree number on row n of Pascal's triangle, 1 if all terms on that row are squarefree. 6
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, 2, 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, 2, 2, 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, 2, 5, 2, 5, 2, 2, 2, 5, 2, 3, 2, 3, 2, 2, 2, 2, 2, 3, 3, 3, 2 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

COMMENTS

All such n, for which a(n) < 3, form a subsequence of A249724.

LINKS

Table of n, a(n) for n=0..120.

FORMULA

a(n) = A249739(A249716(n)).

PROG

(Scheme) (define (A249717 n) (A249739 (A249716 n)))

CROSSREFS

Cf. A249716, A249739, A249724.

Differs from A249718 for the first time at n=36, where a(36) = 2, while A249718(36) = 3.

Sequence in context: A257806 A035391 A242552 * A249718 A244518 A161310

Adjacent sequences:  A249714 A249715 A249716 * A249718 A249719 A249720

KEYWORD

nonn

AUTHOR

Antti Karttunen, Nov 04 2014

STATUS

approved

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Last modified December 7 20:40 EST 2021. Contains 349589 sequences. (Running on oeis4.)