62257domain: NAppears in sequencesRow 5 of square array defined in A047662.at n=12A047661Recursively defined polynomials, read by row.at n=54A109086a(n) is the constant term in expansion of Product_{k=1..n} (x^prime(k) + 1 + 1/x^prime(k))^2.at n=7A369388