# A057868 (b-file synthesized from sequence entry) 1 48 2 5760 3 362880 4 19353600 5 958003200 6 31384184832000 7 2092278988800 8 341459930972160000 9 183927391818153984000 10 32114306507931648000000 11 620448401733239439360000 12 81303558563123696133734400000 13 9678995067038535254016000000 14 2122022878497528469090467840000000