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 A115980 #6 Sep 16 2019 18:06:53 %S A115980 1,2,2,3,2,4,4,3,2,4,6,5,4,6,2,4,6,8,6,3,4,4,8,9,2,4,6,8,10,7,4,12,8, %T A115980 4,8,12,12,2,4,6,8,10,12,8,3,6,5,4,14,21,12,4,8,12,16,15,2,4,6,8,10, %U A115980 12,14,9 %N A115980 Array read by rows distributing the values of A000712 (vertically) and A001519 (horizontally). %C A115980 A001906 records the partial sums of the column sequence A001519 and is also the row sum of A078812 and of A085643; sequences linking a(n) to compositions of n having k parts when there are q kinds of part q. - _Alford Arnold_, Apr 30 2006 %e A115980 The array begins: %e A115980 1 %e A115980 ..2 %e A115980 ....2 %e A115980 ....3 %e A115980 ......2 %e A115980 ......4..3 %e A115980 ......4 %e A115980 .........2 %e A115980 .........4..4..3 %e A115980 .........6..6..4 %e A115980 .........5 %e A115980 with column sums beginning 1 2 5 10 20 ...A000712 related to A000041 %e A115980 and sums over each template beginning 1 2 5 13 34 ...A001519 related to A000045 %Y A115980 Cf. A000041, A000045. %Y A115980 Cf. A001906, A078812, A085643. %K A115980 easy,nonn,tabf %O A115980 0,2 %A A115980 _Alford Arnold_, Feb 11 2006