# A086756 (b-file synthesized from sequence entry) 1 1 2 4 3 27 4 256 5 3125 6 46656 7 823543 8 16777216 9 387420489 10 0 11 85311670611 12 916100448256 13 2875106592253 14 12006825558016 15 893890380859375 16 6744073709551616 17 40261886336764177 18 408075296537575424