# A052140 (b-file synthesized from sequence entry) 0 1 1 8 2 160 3 6144 4 399360 5 40058880 6 5771427840 7 1131282432000 8 289610945003520 9 93834041307955200 10 37533620328254668800 11 18166272406298453606400 12 10463772914064222584832000 13 7073510490325302759338803200 14 5545632224438439107673194496000