# A150014 (b-file synthesized from sequence entry) 0 1 1 2 2 5 3 18 4 66 5 234 6 931 7 3768 8 14868 9 62079 10 262221 11 1088156 12 4673851 13 20235559 14 86466939 15 378333205 16 1664920163 17 7252032306 18 32147861808 19 143128870572 20 631965293765 21 2828788664820 22 12705192301169 23 56670108122926 24 255577539573779 25 1155787880338026 26 5196053668562184 27 23574579310744286