a(n+2) = 16*a(n+1) - a(n), with a(1)=0, a(2)=4.

A154021

a(n+2) = 16*a(n+1) - a(n), with a(1)=0, a(2)=4.

Terms

    a(0) =0a(1) =4a(2) =64a(3) =1020a(4) =16256a(5) =259076a(6) =4128960a(7) =65804284a(8) =1048739584a(9) =16714029060a(10) =266375725376

External references