120819domain: NAppears in sequencesA sequence derived from pentagonal numbers, or a Stirling number of the first kind matrix.at n=33A094952Expansion of 1 / (1-4*x^2-3*x^3). (4,3)-Padovan sequence.at n=15A176737Number of partitions of n with seven sorts of part 1 which are introduced in ascending order.at n=10A320738