This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A067315 #10 Aug 24 2024 06:06:03 %S A067315 4,6,8,10,14,16,18,20,22,24,26,28,32,34,36,38,40,42,44,46,48,50,52,54, %T A067315 58,60,62,64,66,68,70,72,74,76,78,80,82,86,88,92,94,96,98,100,102,104, %U A067315 106,108,110,112,114,116,118,120,122,124,126,128,130,134,136,138,140 %N A067315 Numbers k such that binomial(k, floor(k/2)) is not divisible by k. %C A067315 All the terms are even. - _Amiram Eldar_, Aug 24 2024 %H A067315 Amiram Eldar, <a href="/A067315/b067315.txt">Table of n, a(n) for n = 1..10000</a> %t A067315 Select[ Range[ 2, 150, 2 ], Mod[ Binomial[ #, #/2 ], # ]>0& ] %o A067315 (PARI) is(k) = binomial(k, k\2) % k > 0; \\ _Amiram Eldar_, Aug 24 2024 %Y A067315 Cf. A001405, A042970, A042996 (complement), A067348. %K A067315 nonn %O A067315 1,1 %A A067315 _Labos Elemer_, Jan 14 2002