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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
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Row sums = A134062: (1, 8, 18, 38, 78, 158,...).
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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,...).
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EXAMPLE
| First few rows of the triangle are:
1;
3, 5;
3, 10, 5;
3, 15, 15, 5;
3, 20, 30, 20, 5;
3, 25, 50, 50, 25, 5;
...
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CROSSREFS
| Cf. A124928, A134059, A134062.
Sequence in context: A070554 A076842 A077862 * A167221 A177930 A105574
Adjacent sequences: A134058 A134059 A134060 * A134062 A134063 A134064
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KEYWORD
| nonn,tabl
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AUTHOR
| Gary W. Adamson (qntmpkt(AT)yahoo.com), Oct 05 2007
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