# A375726 (b-file synthesized from sequence entry) 0 1 1 3 2 6 3 16 4 37 5 91 6 218 7 528 8 1273 9 3075 10 7422 11 17920 12 43261 13 104443 14 252146 15 608736 16 1469617 17 3547971 18 8565558 19 20679088 20 49923733 21 120526555 22 290976842 23 702480240 24 1695937321 25 4094354883 26 9884647086 27 23863649056 28 57611945197 29 139087539451 30 335787024098