# A070691 (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 1 11 2048 12 531441 13 67108864 14 6103515625 15 470184984576 16 33232930569601 17 2251799813685248 18 150094635296999121 19 10000000000000000000