# A331938 (b-file synthesized from sequence entry) 0 1 1 2 2 4 3 10 4 28 5 83 6 227 7 626 8 1644 9 4290 10 11322 11 28965 12 74469 13 189436 14 471910 15 1166247 16 2884920 17 7130085 18 17349489 19 42180190 20 101820577 21 242907065 22 579402163 23 1375056009 24 3262651085 25 7768448187 26 18411720785