a(n+2) = 36*a(n+1) - a(n), a(1)=0, a(2)=6.

A154023

a(n+2) = 36*a(n+1) - a(n), a(1)=0, a(2)=6.

Terms

    a(0) =0a(1) =6a(2) =216a(3) =7770a(4) =279504a(5) =10054374a(6) =361677960a(7) =13010352186a(8) =468011000736

External references