# A026619 (b-file synthesized from sequence entry) 1 1 2 5 3 17 4 60 5 217 6 798 7 2970 8 11154 9 42185 10 160446 11 613054 12 2351440 13 9048522 14 34916300 15 135059220 16 523521630 17 2033066025 18 7908332190 19 30807696150 20 120173896920 21 469334610030 22 1834970026500