# A072045 (b-file synthesized from sequence entry) 1 3 2 2 3 16 4 768 5 18432 6 442368 7 127401984 8 9172942848 9 440301256704 10 52836150804480 11 50722704772300800 12 3652034743605657600 13 6135418369257504768000 14 1030750286035260801024000 15 98952027459385036898304000 16 21373637931227167970033664000