Let M = 2 X 2 matrix [ 1 2 / 5 4 ]; a(n) = (2,1) entry of M^n.

A092166

Let M = 2 X 2 matrix [ 1 2 / 5 4 ]; a(n) = (2,1) entry of M^n.

Terms

    a(0) =5a(1) =25a(2) =155a(3) =925a(4) =5555a(5) =33325a(6) =199955a(7) =1199725a(8) =7198355a(9) =43190125a(10) =259140755a(11) =1554844525a(12) =9329067155a(13) =55974402925a(14) =335846417555

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