# A107864 (b-file synthesized from sequence entry) 0 1 1 3 2 21 3 220 4 3060 5 53130 6 1107568 7 26978328 8 752538150 9 23667689815 10 828931106355 11 32006008361808 12 1350990969850340 13 61902409203193230 14 3060335715568296000 15 162392216278033616560 16 9206887338937200407418