828240domain: NAppears in sequencesNumbers with prime factorization pqrstu^4.at n=23A190388a(n) = (-i)^n * Integral_{x>=0} H_n(i*x) * exp(-x), where H_n(x) is n-th Hermite polynomial, i=sqrt(-1).at n=7A277472E.g.f. A(x) satisfies A(x) = 1/( 1 - x * A(x)^2 * cos(x * A(x)^2) ).at n=6A381479