# A308249 (b-file synthesized from sequence entry) 1 0 2 1 3 16 4 81 5 4096 6 6561 7 263169 8 1478656 9 40960000 10 205549569 11 54988374016 12 233605955584 13 6263292059649 14 303894740860929 15 338531738189824 16 170196776412774400 17 709858175909625856 18 18638643564726714369 19 124592287100855910400 20 2576097707358918017025 21 479214351668445504864256