login
A140166
Triangle read by rows, iterates of X * [1,0,0,0,...]; where X = an infinite bidiagonal matrix with [1,-2,1,-2,1,...] in the main diagonal, [1,1,1,...] in the subdiagonal and the rest zeros.
1
1, 1, 1, 1, -1, 1, 1, 3, 0, 1, 1, -5, 3, -2, 1, 1, 11, -2, 7, -1, 1, 1, -21, 9, -16, 6, -3, 1, 1, 43, -12, 41, -10, 12, -2, 1, 1, -85, 31, -94, 31, -34, 10, -4, 1, 1, 171, -54, 219, -63, 99, -24, 18, -3, 1
OFFSET
1,8
COMMENTS
Row sums = A140165
FORMULA
Triangle read by rows, iterates of X * [1,0,0,0,...]; where X = an infinite bidiagonal matrix with [1,-2,1,-2,1,...] in the main diagonal, [1,1,1,...] in the subdiagonal and the rest zeros.
EXAMPLE
First few rows of the triangle are:
1;
1, 1;
1, -1, 1;
1, 3, 0, 1;
1, -5, 3, -2, 1;
1, 11, -2, 7, -1, 1;
1, -21, 9, -16, 6, -3, 1;
1, 43, -12, 41, -10, 12, -2, 1;
1, -85, 31, -94, 31, -34, 10, -4, 1;
...
CROSSREFS
Sequence in context: A088512 A094921 A246522 * A242782 A011256 A294212
KEYWORD
sign,tabl
AUTHOR
Gary W. Adamson, May 10 2008
STATUS
approved