# A012740 (b-file synthesized from sequence entry) 0 1 1 0 2 8 3 448 4 32384 5 3363712 6 498146816 7 101255683072 8 27100382101504 9 9228615461568512 10 3895169435932917760 11 1996505925721071157248 12 1222138138975234336751616 13 880971359478741744513712128