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 A274864 #3 Jul 09 2016 17:38:41 %S A274864 1,1,2,4,8,16,32,64,128,256,512,1024,2048,4096,8192,16448,33024,66304, %T A274864 133120,267264,536576,1077248,2175168,4395968,8888800,17978016, %U A274864 36364960,73558304,148788576,303793408,621878080,1275478720,2619224480,5382273968,11063449024 %N A274864 Number of set partitions of [n] such that the difference between each element and its index (in the partition) is a multiple of seven. %Y A274864 Column k=7 of A274859. %K A274864 nonn %O A274864 0,3 %A A274864 _Alois P. Heinz_, Jul 09 2016