A251391 Indices of squarefree numbers in A098550.

1, 2, 3, 7, 8, 9, 10, 13, 15, 16, 17, 20, 21, 22, 23, 24, 25, 28, 30, 32, 34, 35, 36, 38, 39, 41, 43, 44, 45, 47, 49, 51, 53, 56, 59, 60, 61, 62, 63, 64, 68, 70, 72, 73, 74, 77, 78, 79, 80, 81, 85, 86, 87, 88, 89, 90, 95, 96, 98, 99, 100, 101, 103, 105, 109

Offset

1,2

Comments

a008966(A098550(a(n))) = 1; A100112(A098550(a(n))) > 0;

A098550(a(n)) = a005117(n).

Links

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

Prog

(Haskell)
a251391 n = a251391_list !! (n-1)
a251391_list = filter ((== 1) . a008966 . fromIntegral . a098550) [1..]

Crossrefs

Cf. A098550, A005117, A008966, A100112, A251239 (subsequence).

Sequence in context: A118374 A344624 A154432 * A047361 A037461 A284514

Adjacent sequences: A251388 A251389 A251390 * A251392 A251393 A251394

Keyword

nonn

Author

Reinhard Zumkeller, Dec 02 2014

Status

approved