Let M = the 2 X 2 matrix [ 0 3 / 3 2]. Take (M^n * [1 1])/3 = [p q]; then a(n) = p.

A094726

Let M = the 2 X 2 matrix [ 0 3 / 3 2]. Take (M^n * [1 1])/3 = [p q]; then a(n) = p.

Terms

    a(0) =1a(1) =5a(2) =19a(3) =83a(4) =337a(5) =1421a(6) =5875a(7) =24539a(8) =101953a(9) =424757a(10) =1767091a(11) =7356995a(12) =30617809a(13) =127448573a(14) =530457427a(15) =2207952011a(16) =9190020865a(17) =38251609829a(18) =159213407443a(19) =662691303347

External references