OFFSET
0,2
COMMENTS
Row sums = A105476 starting (1, 3, 6, 15, 33, 78, 177, ...).
FORMULA
Triangle read by rows, iterates of X * [1,0,0,0,...]; where X = an infinite bidiagonal matrix with [2, -1, 2, -1, 2, ...] in the main diagonal, [1, 1, 1, ...] in the subdiagonal and rest zeros.
EXAMPLE
First few rows of the triangle:
1;
2, 1;
4, 1, 1;
8, 3, 3, 1;
16, 5, 9, 2, 1;
32, 11, 23, 7, 4, 1;
64, 21, 57, 16, 15, 3, 1;
128, 43, 135, 41, 46, 12, 5, 1;
256, 85, 313, 94, 133, 34, 22, 4, 1;
512, 171, 711, 219, 360, 99, 78, 18, 6, 1;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, May 10 2008
STATUS
approved