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A134061
Triangle, A124928 + A134059 - A007318.
1
1, 3, 5, 3, 10, 5, 3, 15, 15, 5, 3, 20, 30, 20, 5, 3, 25, 50, 50, 25, 5, 3, 30, 75, 100, 75, 30, 5, 3, 35, 105, 175, 175, 105, 35, 5, 3, 40, 140, 280, 350, 280, 140, 40, 5, 3, 45, 180, 420, 630, 630, 420, 180, 45, 5
OFFSET
0,2
COMMENTS
Row sums = A134062: (1, 8, 18, 38, 78, 158, ...).
FORMULA
Triangle, A124928 + A134059 - A007318 as infinite lower triangular matrices. T(n,k) = 5*binomial(n,k) if k > 0, (0 <= k <= n), with leftmost column = (1,3,3,3,...).
EXAMPLE
First few rows of the triangle:
1;
3, 5;
3, 10, 5;
3, 15, 15, 5;
3, 20, 30, 20, 5;
3, 25, 50, 50, 25, 5;
...
CROSSREFS
KEYWORD
nonn,tabl,more
AUTHOR
Gary W. Adamson, Oct 05 2007
STATUS
approved