%I #6 Feb 08 2017 20:36:07
%S 1,56,14014,4488180,1600210950,606021260768,238569956361984,
%T 96484621769643360,39804374977976438550,16673506088758905946560,
%U 7069147910017295001150416,3026650659542070433624365472,1306409837754633649293171595680,567753549048151735754482750312560
%N Number of solid standard Young tableaux of shape [[7*n,n],[n]].
%H Vaclav Kotesovec, <a href="/A246632/b246632.txt">Table of n, a(n) for n = 0..150</a>
%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Young_tableau">Young tableau</a>
%F a(n) ~ 3/14*sqrt(3/14*(5*sqrt(105)-33)) * 9^(9*n) / (Pi * n * 7^(7*n)). - _Vaclav Kotesovec_, Aug 31 2014
%Y Cf. column k=7 of A176129.
%K nonn
%O 0,2
%A _Vaclav Kotesovec_, Aug 31 2014