# A056380 (b-file synthesized from sequence entry) 1 0 2 0 3 0 4 0 5 0 6 360 7 2520 8 48060 9 317520 10 4109040 11 12923136 12 238785300 13 559279980 14 7612396920 15 37864711260 16 246263046840 17 787758864480 18 13282478342640 19 27723264985920 20 387585098313300 21 1595144664456720