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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 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 January 22 07:39 EST 2020. Contains 331139 sequences. (Running on oeis4.)