# A067688 (b-file synthesized from sequence entry) 1 4 2 16 3 27 4 256 5 3125 6 19683 7 65536 8 823543 9 1096744 10 2836295 11 4294967296 12 4473671462 13 23040925705 14 285311670611 15 7625597484987 16 13579716377989 17 119429556097859 18 302875106592253