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A063865(4n-3).
3

%I #12 Apr 04 2014 10:46:54

%S 2,8,70,722,8220,99820,1265204,16547220,221653776,3025553180,

%T 41931984034,588491482334,8346638665718,119447839104366,

%U 1722663727780132,25011714460877474,365301750223042066,5363288299585278800

%N A063865(4n-3).

%H Ray Chandler, <a href="/A123117/b123117.txt">Table of n, a(n) for n = 1..835</a> (terms < 10^1000)

%F a(n) = 2*A104456(n).

%Y Cf. A063865, A060468, A104456.

%K nonn

%O 1,1

%A _N. J. A. Sloane_, Jul 07 2008