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 A242841 #5 May 24 2014 18:30:36 %S A242841 1,1,2,1,2,8,14,45,99,230,451,953,1798,3503,6683,12693,24209,46155, %T A242841 89200,172767,338255,664453,1317945,2620363,5243700,10509348,21141700, %U A242841 42578221,85897588,173380086,350184780,707320136,1428681390,2885015407,5823971576 %N A242841 Number of compositions of n with difference 1 between the number of odd parts and the number of even parts, both counted without multiplicity. %H A242841 Alois P. Heinz, <a href="/A242841/b242841.txt">Table of n, a(n) for n = 1..500</a> %e A242841 a(1) = 1: [1]. %e A242841 a(2) = 1: [1,1]. %e A242841 a(3) = 2: [1,1,1], [3]. %e A242841 a(4) = 1: [1,1,1,1]. %e A242841 a(5) = 2: [1,1,1,1,1], [5]. %e A242841 a(6) = 8: [1,1,1,1,1,1], [1,2,3], [1,3,2], [2,1,3], [2,3,1], [3,1,2], [3,2,1], [3,3]. %e A242841 a(7) = 14: [1,1,1,1,1,1,1], [1,1,2,3], [1,1,3,2], [1,2,1,3], [1,2,3,1], [1,3,1,2], [1,3,2,1], [2,1,1,3], [2,1,3,1], [2,3,1,1], [3,1,1,2], [3,1,2,1], [3,2,1,1], [7]. %Y A242841 Column k=1 of A242626. %K A242841 nonn %O A242841 1,3 %A A242841 _Alois P. Heinz_, May 23 2014