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 A104185 #19 Oct 26 2024 21:17:34 %S A104185 1,2,11,84,1296,24293,703722,24212879,1157746949,63552536107 %N A104185 Number of partitions of the set 1, 2, 3, ..., 6n+3 into 2n+1 sets of 3 elements each, such that each 3-element set has the same sum (there are no such partitions unless there are 6n+3 elements). %D A104185 Dossey, Giordano, McCrone and Weir, Mathematics methods and modeling for today's mathematics classroom, p. 134 %H A104185 Michael Paul Goldenberg, <a href="http://groups.yahoo.com/group/MathTalk/message/1378">Online discussion</a> %e A104185 a(1) = 2 because with 9 elements they can be partitioned (9 5 1) (8 4 3) (7 6 2) or (9 4 2) (8 6 1) (7 5 3) %o A104185 (Scheme) ; Program to generate terms of the sequence available from _Joshua Zucker_ on request. %Y A104185 Bisection of column k=3 of A203986. - _Alois P. Heinz_, Jan 09 2012 %K A104185 more,nonn %O A104185 0,2 %A A104185 _Joshua Zucker_, Mar 11 2005 %E A104185 More terms from Guenter Stertenbrink %E A104185 The terms 1157746949, 63552536107 were found by _Don Knuth_, Sep 04 2009