A103193 - OEIS

A103193

This sequence needs a meaningful name.

0, 1, 1, 1, 1, 1, 5, 1, -5, -7, 1, -1, 33, 1, -1, -255, 1, 255, 1, 1, -2049, 16385, 1, -32769, 262145, 1, -524289, 1, 1, -8388609, -268435455, 1, 268435455, 8589934593, 1, -1, -549755813887, 1, -1, 70368744177665, 1, -70368744177665, 1, 1, 9007199254740991, -1152921504606846975

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OFFSET

0,7

LINKS

Table of n, a(n) for n=0..45.

MATHEMATICA

a = 1;

M1 = {{2, 0, 1}, {a - 1, a, 0}, {a - 3, 1, a - 1}};

v[0] = {0, 1, 1}; v[1] = {1, 1, 1};

v[n_] := v[n] = MatrixPower[M1, n].v[n - 1];

b = Flatten[Table[v[n], {n, 0, 15}]]

CROSSREFS