# A148622 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 6 4 21 5 59 6 224 7 778 8 3074 9 11996 10 49040 11 203505 12 860069 13 3696639 14 16073620 15 70742766 16 314411761 17 1409236688 18 6367263724 19 28958423806 20 132525828708 21 609812684776 22 2819761081437 23 13097700679165 24 61082151474216 25 285923856913975 26 1342918625701453 27 6326900756629652 28 29893296939002381