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 A104442 #10 Nov 18 2020 20:26:33 %S A104442 1,1,2,4,10,20,56,116,320,736,1872,4176,12712,28368,73592,177272, %T A104442 487304,1130712,3209792,7494720,20419744,49706280,129803592,311179624 %N A104442 Number of ways to split 1, 2, 3, ..., tn into n arithmetic progressions each with t terms, t>n. %Y A104442 Cf. A104429-A104441, A104443. %K A104442 nonn,more %O A104442 0,3 %A A104442 _Jonas Wallgren_, Mar 17 2005 %E A104442 a(0), a(13)-a(23) from _Alois P. Heinz_, Nov 18 2020