# A019154 (b-file synthesized from sequence entry) 3 0 4 1 5 3 6 3 7 13 8 30 9 41 10 136 11 335 12 566 13 1559 14 3919 15 8386 16 21334 17 54333 18 129669 19 327306 20 849762 21 2164290 22 5588388 23 14709540 24 38681879 25 101992196 26 271155602 27 722264852 28 1924729081 29 5143690028 30 13762710938 31 36830667724