%I #3 Sep 12 2021 12:16:47

%S 0,4,42,176,540,1152,2534,4608,6984,12580,19250,26016,39988,55076,

%T 63570,97920,127024,155088,203946,253360,289044,378884,456918

%N A344857(2*n).

%C No formula is known.

%Y Cf. A344857, A344866.

%K nonn,more

%O 1,2

%A _N. J. A. Sloane_, Sep 12 2021