# A018153 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 4 4 8 5 14 6 23 7 40 8 68 9 115 10 196 11 332 12 563 13 954 14 1618 15 2744 16 4651 17 7885 18 13367 19 22661 20 38416 21 65123 22 110398 23 187149 24 317259 25 537824 26 911729 27 1545579 28 2620094 29 4441632 30 7529536 31 12764206 32 21638115