# A352395 (b-file synthesized from sequence entry) 0 1 1 3 2 15 3 105 4 315 5 3465 6 45045 7 45045 8 765765 9 14549535 10 14549535 11 334639305 12 1673196525 13 5019589575 14 145568097675 15 4512611027925 16 4512611027925 17 4512611027925 18 166966608033225 19 166966608033225 20 6845630929362225 21 294362129962575675 22 294362129962575675 23 13835020108241056725