OFFSET
0,3
COMMENTS
This is also the (2,2) element of the product matrix after multiplying the unit matrix from the left by the matrices (0,1;j-1,2j-2) in the order j=2 to n.
MATHEMATICA
M[n_] := {{0, 1}, {(n - 1), 2*(n - 1)}} v[1] = {0, 1} v[n_] := v[n] = M[n].v[n - 1] a = Table[Abs[v[n][[1]]], {n, 1, 25}]
nxt[{n_, a_, b_}]:={n+1, b, 2n*b+n*a}; NestList[nxt, {1, 0, 1}, 20][[;; , 2]] (* Harvey P. Dale, May 26 2023 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Roger L. Bagula, Jun 15 2005
EXTENSIONS
Definition substituted by G. Detlefs' recurrence by the Associate Editors of the OEIS, Sep 28 2009
STATUS
approved