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 A167413 #8 Mar 30 2012 18:52:04 %S A167413 2,2,1,3,1,3,1,3,1,3,1,1,4,1,1,4,1,1,4,1,1,4,1,1,4,1,1,4,1,1,1,5,1,1, %T A167413 1,5,1,1,1,5,1,1,1,5,1,1,1,5,1,1,1,5,1,1,1,5,1,1,1,5,1,1,1,1,6,1,1,1, %U A167413 1,6,1,1,1,1,6,1,1,1,1,6,1,1,1,1,6,1,1,1,1,6,1,1,1,1,6,1,1,1,1,6,1,1,1,1,6 %N A167413 Irregular array with the first differences of row A167384(n,.) in row n. %C A167413 The left column has 2 two's, 4 three's, 6 four's,... ,2*k-2 k's. %C A167413 Entries in the remaining columns are all 1. %C A167413 If one looks at the flattened sequence (2), (2), (1,3), (1,3), (1,3),.. in blocks of 1, 1, 2, 2, 2,.. , A000194(k) terms, the sum of entries in the subsequence in block number k is A001670(k). %e A167413 2; %e A167413 2, 1; %e A167413 3, 1; %e A167413 3, 1; %e A167413 3, 1; %e A167413 3, 1, 1; %e A167413 4, 1, 1; %e A167413 4, 1, 1; %e A167413 4, 1, 1; %e A167413 4, 1, 1; %e A167413 4, 1, 1; %e A167413 4, 1, 1, 1; %e A167413 5, 1, 1, 1; %e A167413 5, 1, 1, 1; %e A167413 5, 1, 1, 1; %e A167413 5, 1, 1, 1; %e A167413 5,... %Y A167413 Cf. A167381. %K A167413 nonn,tabf %O A167413 0,1 %A A167413 _Paul Curtz_, Nov 03 2009