# A094083 (b-file synthesized from sequence entry) 1 1 2 1 3 1 4 4 5 9 6 64 7 25 8 256 9 1225 10 16384 11 3969 12 65536 13 53361 14 1048576 15 184041 16 4194304 17 41409225 18 1073741824 19 147744025 20 4294967296 21 2133423721 22 68719476736 23 7775536041 24 274877906944 25 457028729521 26 17592186044416 27 1690195005625