# A324806 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 27 4 256 5 3125 6 46656 7 823536 8 16776760 9 387399096 10 9999087840 11 285273493890 12 8914479240744 13 302804132739108 14 11108778138153696 15 437740674563572380 16 18439146872674688160 17 826846479804875930400 18 39325078741869629444736 19 1977213223548343109320992