a(n) = ((5^n mod 4^n) mod 3^n) mod 2^n.

Terms

a(0) =1a(1) =0a(2) =7a(3) =0a(4) =21a(5) =37a(6) =118a(7) =56a(8) =19a(9) =428a(10) =808a(11) =3920a(12) =2256a(13) =15240a(14) =28312a(15) =46733a(16) =128931a(17) =251439a(18) =434788a(19) =645833a(20) =1397733a(21) =1179155a(22) =7185704a(23) =1551886a(24) =33308648a(25) =65879944a(26) =121274199a(27) =65829274a(28) =228529703a(29) =248939750