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.
Written as an irregular triangle: 2; 2, 4, 5; 4, 5; 4, 5; 4, 5, 8, 9, 10, 11, 12; 4, 5, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19; 4, 5, 8, 9, 10, 11, 14, 15, 16, 17, 18, 19; 4, 5, 8, 9, 10, 11, 14, 15, 16, 17, 18, 19; 4, 5, 8, 9, 10, 14, 15, 16, 17, 18, 19;
A210762 := proc(n) local L,maxa ; rec := [seq(A005132(j),j=0..n)] ; maxa := max(op(rec)) ; L := [] ; for i from 0 to maxa do if not member(i,rec) then L := [op(L),i] ; end if; end do; if nops(L) = 0 then return [0] ; end if; L ; end proc: seq(op(A210762(n)),n=1..11) ; # R. J. Mathar, Apr 01 2012
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