a(n) = 3*a(n-1) + 6*a(n-2) + a(n-3), with a(0) = 0, a(1) = 2, and a(2) = 7.

A214954

a(n) = 3*a(n-1) + 6*a(n-2) + a(n-3), with a(0) = 0, a(1) = 2, and a(2) = 7.

Terms

    a(0) =0a(1) =2a(2) =7a(3) =33a(4) =143a(5) =634a(6) =2793a(7) =12326a(8) =54370a(9) =239859a(10) =1058123a(11) =4667893a(12) =20592276a(13) =90842309a(14) =400748476a(15) =1767891558a(16) =7799007839a(17) =34405121341a(18) =151777302615a(19) =669561643730

External references