# A012071 (b-file synthesized from sequence entry) 0 1 1 4 2 92 3 5160 4 532880 5 87726464 6 21073486912 7 6956206790528 8 3020988238174464 9 1670080968001854464 10 1145224829994344492032 11 953987340413779610175488 12 948917210079076407043002368