a(n) = 7^n mod n^7.

Terms

a(0) =0a(1) =49a(2) =343a(3) =2401a(4) =16807a(5) =117649a(6) =0a(7) =1570497a(8) =2089855a(9) =2475249a(10) =9122472a(11) =10209313a(12) =5300159a(13) =98001617a(14) =62916193a(15) =84245889a(16) =82474028a(17) =145795249a(18) =530403874a(19) =57612001a(20) =1611673651a(21) =2006506001a(22) =832663280a(23) =2652148801a(24) =4541072682a(25) =7457168625a(26) =3383428402a(27) =6778582433a(28) =4637847366