307358

Appears in sequences

• Compound filter (summands of A004001 & summands of A005185): a(n) = P(A286541(n), A286559(n)), where P(n,k) is sequence A000027 used as a pairing function, with a(1) = a(2) = 0.at n=51A286560
• Expansion of (g/(1 - x*g^2))^2, where g = 1+x*g^4 is the g.f. of A002293.at n=7A391199