A143044 A nonsense sequence.

1, 1, -3, 0, 0, 4, 6, 5, 18, -23, -24, 24, 17, 88, -7, 145, 5, -376, 376, -236, 654, -755, 34, 3025, -2992, 2992, -5983, -720, -11279, -18015, 48141, -112, 112, -66268, -95338, -85227, -294862, 389049, 381240, -381240, -302671, -1445240, 69609, -2448591, 110613, 6162200, -6162200, 3602996

Offset

1,3

Links

Table of n, a(n) for n=1..48.

Mathematica

m0 = Inverse[{{0, I}, {I, 1}}];
M[0] = {{0, -1}, {-1, -1}}.m0;
M[1] = {{1, 0}, {-1, -1}}.m0;
M[2] = {{-1, 0}, {-1, -1}}.m0;
M[3] = {{0, 1}, {-1, -1}}.m0;
M[4] = I*{{0, -1}, {-1, -1}}.m0;
M[5] = I*{{1, 0}, {-1, -1}}.m0;
M[6] = I*{{-1, 0}, {-1, -1}}.m0;
M[7] = I*{{0, 1}, {-1, -1}}.m0;
v[0] = {1, 1};
v[n_] := v[n] = M[Mod[n, 7]].v[n - 1];
ar = Table[Re[v[n][[1]]], {n, 0, 50}]

Crossrefs

Sequence in context: A304263 A305223 A316801 * A350789 A361357 A305151

Adjacent sequences: A143041 A143042 A143043 * A143045 A143046 A143047

Keyword

uned,obsc,less,sign

Author

Roger L. Bagula, Oct 13 2008

Status

approved