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%I #13 Mar 29 2017 20:54:48
%S 1,4,4,16,100,784,7056,69696,736164,8179600,94556176,1128422464,
%T 13823175184,173075968576,2207601640000,28610517254400,
%U 375960078296100,5000659311315600,67231086296576400,912554910950760000,12492876730915904400,172350707553043905600
%N a(n) = A284016(n)^2.
%C There exists a set of Ramanujan-Sato series using this sequence.
%C Also a(n)=A002420(n+1)^2.
%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Ramanujan%E2%80%93Sato_series#Similar_series">Ramanujan-Sato series</a>.
%t Table[(2*CatalanNumber[n])^2, {n, -1, 20}]
%Y Cf. A000108 (Catalan numbers), A284016, A002420.
%K nonn
%O -1,2
%A _Ralf Steiner_, Mar 28 2017
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