a(n) is the trace of the n-th power of the 2 X 2 matrix [1 2; 3 4].
A327765
a(n) is the trace of the n-th power of the 2 X 2 matrix [1 2; 3 4].
Terms
- a(0) =2a(1) =5a(2) =29a(3) =155a(4) =833a(5) =4475a(6) =24041a(7) =129155a(8) =693857a(9) =3727595a(10) =20025689a(11) =107583635a(12) =577969553a(13) =3105015035a(14) =16681014281a(15) =89615101475a(16) =481437535937
External references
- oeis: A327765