# A278679 (b-file synthesized from sequence entry) 2 1 3 5 4 24 5 128 6 770 7 5190 8 38864 9 320704 10 2894544 11 28382800 12 300575968 13 3419882304 14 41612735632 15 539295974000 16 7417120846080 17 107904105986048 18 1655634186628352 19 26721851169634560 20 452587550053179392 21 8026445538106839040 22 148751109541600495104