2204475domain: NAppears in sequencesNumber of partitions of n into parts of 7 kinds.at n=13A023006The z^2 coefficients of the polynomials in the GF1 denominators of A156921.at n=16A157706a(n) = denominator((4^(2*n+1)*n!^2)/((2*n+3)*(2*n)!)).at n=11A378071