A142711 A determinant sequence: M={{a(-1 + n), a(-2 + n), a(-3 + n)}, {a(-2 + n), a(-3 + n), a(-4 + n)}, {a(-3 + n), a(-4 + n), a(-5 + n)}} a(n)=Det[M].

1, 2, 3, 5, 7, 1, -12, -228, 9143, -1133843, 400077995, -45302489148575, -7894734009904518933828, -18747504667646398964781036890058108, -959911201550764602188142115589327060336513904282657913

Offset

1,2

Links

Table of n, a(n) for n=1..15.

Formula

M={{a(-1 + n), a(-2 + n), a(-3 + n)}, {a(-2 + n), a(-3 + n), a(-4 + n)}, {a(-3 + n), a(-4 + n), a(-5 + n)}} a(n)=Det[M].

Mathematica

Clear[a, n, m, k]; M = Table[Table[a[n - m - k - 1], {m, 0, 2}], {k, 0, 2}]; b = Det[M]; Table[a[i] = If[i == 0, 1, Prime[i]], {i, 0, 4}]; a[n_] := a[n] = b; Table[a[n], {n, 0, 15}]

Crossrefs

Sequence in context: A130136 A197124 A032759 * A357096 A093338 A229875

Adjacent sequences: A142708 A142709 A142710 * A142712 A142713 A142714

Keyword

uned,sign

Author

Roger L. Bagula and Gary W. Adamson, Sep 25 2008

Status

approved