# A053773 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 64 4 4096 5 1048576 6 1073741824 7 4398046511104 8 72057594037927936 9 1989505896802466922496 10 164384949539438492410445824 11 47902612878717208996830483841024