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%I #2 Mar 30 2012 18:40:08
%S 3,21,903,1631721,5325028475403,56711856527710922180500221,
%T 82753323662259982099234097722219590008756576353188748920925694383267934319786203404455994065868822592721
%N Integers equal to sqrt(A174864/4).
%C a(n) is divisible by 3.
%C a(n+1)/a(n)= A000058(n) [From _Giovanni Teofilatto_, Apr 18 2010]
%Y Cf. A174864, A176349.
%K nonn
%O 1,1
%A _Giovanni Teofilatto_, Apr 17 2010
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