-3749domain: ZAppears in sequencesa(n) = -(n + 1)*(2*n^2 + n - 12)/6.at n=22A058372Coefficients in expansion of 1/(1 + 2*x - 3*x^3).at n=15A317499G.f. A(x) satisfies Sum_{n=-oo..+oo} (x^n - A(x))^n = Sum_{n>=0} x^(n^2).at n=14A370031a(n) = Sum_{k = 0..n} (-1)^(n+k)*binomial(n, k)*binomial(n+k, k)*A108625(n-1, n-k).at n=5A376458