# A151293 (b-file synthesized from sequence entry) 0 1 1 2 2 7 3 24 4 88 5 328 6 1246 7 4779 8 18485 9 71918 10 281102 11 1102653 12 4337842 13 17104951 14 67577658 15 267410057 16 1059581561 17 4203221319 18 16689714274 19 66324649355 20 263761185264 21 1049579758069 22 4178825351781 23 16645543692333 24 66331807758634 25 264426232745902 26 1054454512710944 27 4206064951123326