# A046987 (b-file synthesized from sequence entry) 1 120 2 523776 3 1476304896 4 31998395520 5 30823866178560 6 69357059049509038080 7 4010059765937523916800 8 27099073228001299660800 9 686498980761986918441287680 10 2827987212986831882236723200