# A375905 (b-file synthesized from sequence entry) 0 1 1 3 2 15 3 111 4 1116 5 14352 6 226176 7 4233492 8 91936080 9 2274815712 10 63220205736 11 1950659365608 12 66187523184048 13 2450020566119760 14 98269427218682880 15 4246150991775421824 16 196657057172519603712 17 9719485198364207149056 18 510628699670802850684800