# A373004 (b-file synthesized from sequence entry) 1 1 2 8 3 81 4 1054 5 15625 6 279936 7 5764801 8 134480378 9 3486843447 10 100000000000 11 3138428376721 12 107006262884442 13 3937376385699289 14 155568095557812224 15 6568408355712890625 16 295150156996346511346 17 14063084452067724991009 18 708235345964697414795264