# A052965 (b-file synthesized from sequence entry) 0 1 1 2 2 10 3 34 4 134 5 498 6 1894 7 7138 8 26998 9 101970 10 385350 11 1455938 12 5501334 13 20786354 14 78540646 15 296762018 16 1121303222 17 4236795154 18 16008550278 19 60487618562 20 228549876182 21 863565901682 22 3262946735526 23 12328904308578