# A292934 (b-file synthesized from sequence entry) 0 0 1 0 2 2 3 6 4 48 5 400 6 4140 7 49644 8 681296 9 10515600 10 180349380 11 3402380740 12 70023004920 13 1561206957336 14 37485640585484 15 964345394431020 16 26462386594676640 17 771532717446066208 18 23817889096309943892 19 776127882633846005268