# A203228 (b-file synthesized from sequence entry) 1 1 2 3 3 20 4 492 5 59328 6 42750720 7 215488512000 8 8688622215168000 9 3152932286024908800000 10 11441362514460661304524800000 11 456702585875829909265192058880000000 12 218761269624450195162273767321763840000000000