253980

Appears in sequences

• a(n) = 784*n^2 - 2*n.at n=17A158398
• a(n) = 1296*n^2 - 36.at n=13A158737
• G.f.: A(x) = 1 + x*B(x), where B(x) = 1 + x^2*C(x)^2, C(x) = 1 + x^3*D(x)^3, D(x) = 1 + x^4*E(x)^4, ...at n=43A228866