# A051485 (b-file synthesized from sequence entry) 0 0 1 1 2 1 3 2 4 6 5 14 6 32 7 74 8 180 9 457 10 1195 11 3177 12 8526 13 23018 14 62441 15 170153 16 465791 17 1280956 18 3538618 19 9817619 20 27348480 21 76467497 22 214532805 23 603732396 24 1703728554 25 4819990947 26 13667248631 27 38834528740 28 110556072877 29 315290709729 30 900635841754 31 2576615923655 32 7381956798465 33 21177682172332 34 60832837964492