a(n) = 7^n mod 2^n.

Terms

a(0) =0a(1) =1a(2) =1a(3) =7a(4) =1a(5) =7a(6) =17a(7) =119a(8) =193a(9) =327a(10) =753a(11) =1175a(12) =2081a(13) =6375a(14) =3665a(15) =9271a(16) =32129a(17) =28295a(18) =66993a(19) =206807a(20) =923361a(21) =1220647a(22) =2253073a(23) =7382903a(24) =9737281a(25) =1052103a(26) =40919153a(27) =17998615a(28) =125990305a(29) =345061223