A094453 Numbers k such that binomial(2*k, k)/(k+2) is not an integer.

1, 2, 4, 6, 7, 10, 13, 14, 25, 28, 30, 31, 34, 37, 40, 62, 79, 82, 85, 88, 91, 94, 106, 109, 112, 115, 118, 121, 126, 241, 244, 247, 250, 253, 254, 256, 268, 271, 274, 277, 280, 283, 322, 325, 328, 331, 334, 337, 349, 352, 355, 358, 361, 364, 510, 727, 730, 733

Offset

1,2

Comments

A191107 is a subsequence as the relevant terms of A000984 are not divisible by 3 (see the comments in A005836 and A191107). - Peter Munn, Aug 14 2023

Links

Table of n, a(n) for n=1..58.

Mathematica

Select[ Range[735], Mod[Binomial[2#, # ], (# + 2)] != 0 &]

Crossrefs

Cf. A000108, A000984, A005836, A094575, A094576, A191107.

Sequence in context: A071260 A026407 A003035 * A191200 A026398 A374432

Adjacent sequences: A094450 A094451 A094452 * A094454 A094455 A094456

Keyword

nonn

Author

Robert G. Wilson v, May 11 2004

Status

approved