58916domain: NAppears in sequences5th-order Vatalan numbers (generalization of Catalan numbers).at n=5A025758Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-1) + b(n-2) - n, where a(0) = 1, a(1) = 3, b(0) = 2, b(1) = 4.at n=19A294417Expansion of Product_{k>=1} (1 - x^prime(k))^prime(k).at n=48A300521