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%I #4 Mar 30 2012 17:39:33
%S 2,14,310,5334,22361430,5726491990,91625444694,1537228670661645654,
%T 1772303994379887828232566404493432150,
%U 127707961738824071529862251643555745658871456065738070,8776024305713098891493168973639040433964428736682367693182293334,9649340769776349618630915417390658987602357538676244438223111363610210030934
%N M(M-1)/3, where M is Mersenne prime A000668(n).
%C Terms from a(13) on have 314 or more digits and are not listed for that reason. - _R. J. Mathar_, May 11 2008
%F a(n)=A000668(n)*(A000668(n)-1)/3.
%Y Cf. A000668, A036689, A139115, A139116, A139223, A139224, A139226.
%K nonn
%O 1,1
%A _Omar E. Pol_, May 10 2008
%E More terms from _R. J. Mathar_, May 11 2008
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