# A054856 (b-file synthesized from sequence entry) 0 1 1 1 2 5 3 13 4 40 5 117 6 348 7 1029 8 3049 9 9028 10 26738 11 79183 12 234502 13 694476 14 2056692 15 6090891 16 18038173 17 53420041 18 158203433 19 468519406 20 1387520047 21 4109140098 22 12169216863 23 36039131181 24 106729873498 25 316080480394 26 936072224321