# A148466 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 6 4 19 5 61 6 221 7 815 8 3095 9 12109 10 48260 11 195368 12 803053 13 3337237 14 14015560 15 59384502 16 253544419 17 1090093997 18 4715233418 19 20507407116 20 89633056681 21 393499148239 22 1734526536805 23 7673967478285 24 34066109008637 25 151697174130059 26 677446012298428 27 3033350909365552 28 13615684209776521