# A187444 (b-file synthesized from sequence entry) 0 1 1 5 2 35 3 231 4 1716 5 12155 6 92378 7 676039 8 5200300 9 38779380 10 300540195 11 2268783825 12 17672631900 13 134564468610 14 1052049481860 15 8061900920775 16 63205303218876 17 486734856412028 18 3824345300380220 19 29566145391215356 20 232714176627630544 21 1804857108504066435