# A031148 (b-file synthesized from sequence entry) 1 2 2 1 3 2 4 5 5 14 6 43 7 138 8 455 9 1540 10 5305 11 18546 12 65616 13 234546 14 845683 15 3072350 16 11235393 17 41326470 18 152793376 19 567518950 20 2116666670 21 7924062430 22 29765741831 23 112157686170 24 423809991041 25 1605622028100