# A050611 (b-file synthesized from sequence entry) 0 1 1 3 2 6 3 21 4 35 5 126 6 273 7 987 8 1598 9 5781 10 12549 11 45402 12 76657 13 277347 14 602070 15 2178309 16 3524579 17 12752046 18 27682401 19 100155867 20 169104754 21 611826747 22 1328165979 23 4805349654 24 7782268225 25 28156510947 26 61122728166 27 221144107989