# A123570 (b-file synthesized from sequence entry) 0 1 1 2 2 9 3 82 4 1025 5 15626 6 279937 7 5764802 8 134217729 9 3486784402 10 100000000001 11 3138428376722 12 106993205379073 13 3937376385699290 14 155568095557812225 15 6568408355712890626 16 295147905179352825857 17 14063084452067724991010