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 A144867 #9 Jul 29 2023 12:13:58 %S A144867 1,1,1,2,1,3,6,1,1,2,6,4,6,9,2,1,6,1,6,2,11,8,6,3,2,9,1,14,6,6,6,1,10, %T A144867 10,9,4,6,8,12,3,6,15,6,14,5,9,6,4,6,3,12,13,6,1,8,12,13,9,6,7,6,9,11, %U A144867 1,13,17,6,17,11,15,6,2,6,9,5,13,36,16,6,2,1,10,6,29,10,8,10,15,6,5,36,14 %N A144867 Shadow transform of C(n+5,6) = A000579(n+5). %H A144867 Alois P. Heinz, <a href="/A144867/b144867.txt">Table of n, a(n) for n = 1..10000</a> %H A144867 N. J. A. Sloane, <a href="/transforms.txt">Transforms</a> %p A144867 shadow:= proc(p) proc(n) add(`if`(modp(p(j), n)=0, 1, 0), j=0..n-1) end end: %p A144867 f:= proc(k) proc(n) binomial(n+k-1, k) end end: %p A144867 a:= shadow(f(6)): %p A144867 seq(a(n), n=1..100); %Y A144867 6th column of A144871. %Y A144867 Cf. A007318. %K A144867 nonn %O A144867 1,4 %A A144867 _Alois P. Heinz_, Sep 23 2008