# A012345 (b-file synthesized from sequence entry) 0 2 1 8 2 248 3 11328 4 849312 5 94857600 6 14819214720 7 3091936512000 8 831657655349760 9 280473756197529600 10 115967597965430077440 11 57712257892456911912960 12 34039765801079493369569280