# A056296 (b-file synthesized from sequence entry) 1 0 2 0 3 1 4 2 5 5 6 18 7 43 8 126 9 339 10 946 11 2591 12 7254 13 20125 14 56450 15 158355 16 446618 17 1262225 18 3580686 19 10181479 20 29032254 21 82968843 22 237645250 23 682014587 24 1960981598 25 5647919645 26 16292761730 27 47069104613 28 136166703562 29 394418199725 30 1143822046786 31 3320790074371