# A307935 (b-file synthesized from sequence entry) 1 0 2 4 3 120 4 6912 5 631680 6 84211200 7 15432560640 8 3722677862400 9 1143584003358720 10 435902085306777600 11 201889940373209088000 12 111673403387053395148800 13 72713691524377589317632000 14 55052849030095232395798118400 15 47957058157063329359371173888000