# A331726 (b-file synthesized from sequence entry) 0 0 1 1 2 6 3 45 4 448 5 5825 6 95796 7 1926043 8 45944256 9 1269187137 10 39840825700 11 1400286658331 12 54462564354672 13 2321934762267601 14 107664031299459012 15 5393893268767761675 16 290341440380472614656 17 16710435419661861992705 18 1024009456958258244673860