a(n) = 8*a(n-1) - 19*a(n-2) + 12*a(n-3) (n >= 3) with a(0) = a(1) = 1, a(2) = 2.

A162725

a(n) = 8*a(n-1) - 19*a(n-2) + 12*a(n-3) (n >= 3) with a(0) = a(1) = 1, a(2) = 2.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =9a(4) =46a(5) =221a(6) =1002a(7) =4369a(8) =18566a(9) =77541a(10) =320002a(11) =1309529a(12) =5326686a(13) =21572461a(14) =87087002a(15) =350739489a(16) =1410132406a(17) =5662052981a(18) =22712782002a(19) =91044838249a(20) =364760483726

External references