# A058126 (b-file synthesized from sequence entry) 0 1 1 0 2 0 3 18 4 240 5 3100 6 46620 7 823494 8 16777152 9 387420408 10 9999999900 11 285311670490 12 8916100448112 13 302875106592084 14 11112006825557820 15 437893890380859150 16 18446744073709551360