# A036673 (b-file synthesized from sequence entry) 1 1 2 2 3 3 4 9 5 20 6 64 7 205 8 747 9 2767 10 10850 11 43254 12 176990 13 735007 14 3099272 15 13220407 16 57001841 17 248009246 18 1087947441 19 4807232915 20 21381055533 21 95660032110 22 430298114499 23 1945096434552 24 8832200860663 25 40271358004756 26 184325394540531 27 846667179332120