a(n) = n^7 + 1.

Terms

a(0) =1a(1) =2a(2) =129a(3) =2188a(4) =16385a(5) =78126a(6) =279937a(7) =823544a(8) =2097153a(9) =4782970a(10) =10000001a(11) =19487172a(12) =35831809a(13) =62748518a(14) =105413505a(15) =170859376a(16) =268435457a(17) =410338674a(18) =612220033a(19) =893871740a(20) =1280000001a(21) =1801088542a(22) =2494357889a(23) =3404825448a(24) =4586471425a(25) =6103515626a(26) =8031810177