# A281027 (b-file synthesized from sequence entry) 1 1 2 2 3 6 4 48 5 240 6 34560 7 241920 8 92897280 9 15049359360 10 288947699712000 11 3178424696832000 12 3954468870810501120000 13 51408095320536514560000 14 232150733172291613910630400000 15 338475768965201173081699123200000000 16 3493719809197289292455451813740544000000000