A046106 G.f.: g.f. for A001411 / g.f. for A004018.

1, 0, 8, 4, 48, 68, 284, 684, 1816, 5608, 12684, 42068, 92916, 304100, 688988, 2170020, 5088784, 15436172, 37281880, 109786204, 271062388, 781016892, 1958863988, 5555714820, 14090644980, 39503105472, 101000072900, 280693435596

Offset: 0

Author

N. J. A. Sloane, based on a suggestion of Maurice Craig (Maurice.D.Craig(AT)BHPBilliton.com), May 11 2003

Keywords

• nonn

Examples

			1 + 4*q + 12*q^2 + 36*q^3 + 100*q^4 + 284*q^5 + 780*q^6 + 2172*q^7 + 5916*q^8 + 16268*q^9 + ... / 1 + 4*q + 4*q^2 + 4*q^4 + 8*q^5 + 4*q^8 + 4*q^9 + ... = 1 + 8*q^2 + 4*q^3 + 48*q^4 + 68*q^5 + 284*q^6 + 684*q^7 + 1816*q^8 + 5608*q^9 + ...
		

Crossrefs

Cf. A001411, A004018.