# A132472 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 12 4 132 5 2200 6 50020 7 1458576 8 52443832 9 2262992496 10 114895662336 11 6760541866320 12 455507310538720 13 34799057492306432 14 2989515666973533776 15 286751042457693435936 16 30519571712404528878560