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A141045
Triangle of subsequences of A140825 with a mirror symmetry.
2
-1, 1, -1, -19, 11, -19, 27, -11, 11, -27, -863, 271, -191, 271, -863, 1375, -351, 191, -191, 351, -1375, -33953, 7297, -3233, 2497, -3233, 7297, -33953
OFFSET
0,4
COMMENTS
The triangle shows A140825(3) in the first row and fills the n-th row by successively skipping two terms of A140825 and taking the next n terms. The absolute values of the triangle generated this way are symmetric with respect to mirror-operation at the row centers. We are essentially reading numerators down columns of the triangle in A140825, a(i,j), 0<=i<=j-2.
EXAMPLE
The triangle starts:
-1;
1, -1;
-19, 11, -19;
27, -11, 11, -27;
CROSSREFS
Sequence in context: A050276 A107808 A214422 * A157411 A166525 A083156
KEYWORD
sign,tabl,less
AUTHOR
Paul Curtz, Jul 31 2008
EXTENSIONS
Edited by R. J. Mathar, Aug 12 2008
STATUS
approved