# A143002 (b-file synthesized from sequence entry) 0 0 1 1 2 21 3 751 4 38500 5 2617756 6 225629712 7 23924915568 8 3053853073152 9 461404969871616 10 81403191005875200 11 16580318776579814400 12 3861255442546368921600 13 1019529192596773592678400