a(n) = n^8 + 1.

Terms

a(0) =1a(1) =2a(2) =257a(3) =6562a(4) =65537a(5) =390626a(6) =1679617a(7) =5764802a(8) =16777217a(9) =43046722a(10) =100000001a(11) =214358882a(12) =429981697a(13) =815730722a(14) =1475789057a(15) =2562890626a(16) =4294967297a(17) =6975757442a(18) =11019960577a(19) =16983563042a(20) =25600000001a(21) =37822859362a(22) =54875873537a(23) =78310985282a(24) =110075314177a(25) =152587890626