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 A207818 #12 Mar 30 2012 19:00:52 %S A207818 1,3,15,105,981,11775,174309,3070293,62728749,1462046235,38446605975, %T A207818 1131448219263,37011386961477,1337106744965847,53005310776229283, %U A207818 2290750722850361415,107258522028595441911,5410293190992424617243,292567014870308385871989 %N A207818 The sum of the second powers of the numbers of solid standard Young tableaux over all planar partitions of n. %D A207818 Shalosh B. Ekhad and Doron Zeilberger, Computational and Theoretical Challenges On Counting Solid Standard Young Tableaux. %H A207818 Thotsaporn Thanatipanonda, <a href="/A207818/a207818_1.txt">Maple code for A207818</a> %e A207818 a(2) = 3 since the planar partitions [[2]], [[1,1]], [[1],[1]] in which each of these has only one tableaux. %p A207818 # see link above for program. %K A207818 nonn %O A207818 1,2 %A A207818 _Thotsaporn Thanatipanonda_, Feb 27 2012