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 A133881 #9 Jun 05 2023 11:42:30 %S A133881 4,68,164,260,292,356,388,452,484,516,548,676,708,772,836,932,964, %T A133881 1028,1060,1124,1156,1252,1348,1412,1444,1508,1572,1604,1636,1732, %U A133881 1796,1828,1892,1924,2084,2116,2244,2276,2308,2372,2404,2468,2564,2596,2692,2756 %N A133881 Even numbers k such that binomial(k+p,k) mod k = 1, where p=10. %H A133881 Harvey P. Dale, <a href="/A133881/b133881.txt">Table of n, a(n) for n = 1..1000</a> %t A133881 Select[2*Range[1500],Mod[Binomial[10+#,#],#]==1&] (* _Harvey P. Dale_, Jun 05 2023 *) %Y A133881 Cf. A133620, A133621-A133625, A133630, A038509, A133634-A133636. %Y A133881 Cf. A133880, A133890, A133900, A133910. %K A133881 nonn %O A133881 1,1 %A A133881 _Hieronymus Fischer_, Oct 16 2007