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