# A361572 (b-file synthesized from sequence entry) 0 1 1 0 2 0 3 6 4 72 5 720 6 7560 7 90720 8 1270080 9 20381760 10 364694400 11 7125148800 12 150186960000 13 3393726336000 14 81882210009600 15 2102315389574400 16 57244753133568000 17 1647544166940672000 18 49957730917981286400 19 1591303422125646028800