# A042949 (b-file synthesized from sequence entry) 1 0 2 0 3 48 4 576 5 4752 6 36864 7 271680 8 1931808 9 13384320 10 91133664 11 610863072 12 4051654752 13 26592186336 14 173304754368 15 1121024960064