# A004308 (b-file synthesized from sequence entry) 4 0 5 0 6 24 7 154 8 1664 9 15984 10 173000 11 2004486 12 25086336 13 337215372 14 4852472744 15 74473953570 16 1214929163904 17 21000334935308 18 383498204201496 19 7379028867234934 20 149233618755354240 21 3165087929247599208 22 70251457394397108280