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 A117117 #7 May 31 2018 11:21:52 %S A117117 1,1,2,4,6,8,13,15,21,29,37,45,62,70,89,108,132,151,191,210,256,296, %T A117117 350,390,476,516,610,684,795,869,1025,1099,1274,1399,1593,1718,1994, %U A117117 2119,2414,2614,2949,3149,3585,3785,4267,4577,5099,5409,6102,6412,7145,7603,8422 %N A117117 A sequence related to M-partitions. %H A117117 O. J. Rodseth, <a href="https://dx.doi.org/10.1016/j.disc.2006.02.010">Enumeration of M-partitions</a>, Discrete Math., 306 (2006), 694-698. (See E(x).) %p A117117 # To get about 80 terms, first define B and D2 as in A117115. E2:=add( x^(2^(j+1)-4)*subs(x=x^(3*2^(j-1)),D2)*mul(1/(1-x^(2^i)),i=0..j), j=1..8); series(E2,x,81); %Y A117117 Cf. A000123, A100529, A117115. %K A117117 nonn %O A117117 0,3 %A A117117 _N. J. A. Sloane_, Apr 26 2006