# A167141 (b-file synthesized from sequence entry) 0 1 1 4 2 48 3 864 4 20880 5 632448 6 23018688 7 978179328 8 47529084096 9 2598928566336 10 157937795847936 11 10559489876375040 12 770269715428025088 13 60876094422772800000 14 5181654464327251948032 15 472584847824904789910016