# A027109 (b-file synthesized from sequence entry) 0 1 1 2 2 6 3 29 4 131 5 619 6 3013 7 14854 8 73996 9 372023 10 1883369 11 9591012 12 49091034 13 252371780 14 1302419484 15 6744389329 16 35031370911 17 182457629783 18 952674694705 19 4985494458892 20 26143834054498 21 137358293523986 22 722938114992478