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%I #20 Mar 30 2022 06:33:58
%S 1,16777216,13841287201,1000000000000,23298085122481,281474976710656,
%T 2213314919066161,12855002631049216,59604644775390625,
%U 232218265089212416,787662783788549761,2386420683693101056,6582952005840035281,16777216000000000000,39959630797262576401
%N a(n) = (3*n+1)^12.
%H Vincenzo Librandi, <a href="/A016788/b016788.txt">Table of n, a(n) for n = 0..10000</a>
%H <a href="/index/Rec#order_13">Index entries for linear recurrences with constant coefficients</a>, signature (13,-78,286,-715,1287,-1716,1716,-1287,715,-286,78,-13,1).
%F a(n) = A008456(A016777(n)). - _Michel Marcus_, Jun 16 2016
%F Sum_{n>=0} 1/a(n) = PolyGamma(11, 1/3)/21213424108800. - _Amiram Eldar_, Mar 30 2022
%t Table[(3n+1)^12,{n,0,100}] (* _Mohammad K. Azarian_, Jun 15 2016 *)
%o (Magma) [(3*n+1)^12: n in [0..20]]; // _Vincenzo Librandi_, Sep 29 2011
%Y Cf. A008456, A016777, A016778, A016779, A016780, A016781, A016782, A016783, A016784, A016785, A016786, A016787.
%Y Subsequence of A008456.
%K nonn,easy
%O 0,2
%A _N. J. A. Sloane_.
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