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A104766
Triangle T(n,k) = A001629(n-k+2) read by rows, 1<=k<=n.
0
1, 2, 1, 5, 2, 1, 10, 5, 2, 1, 20, 10, 5, 2, 1, 38, 20, 10, 5, 2, 1, 71, 38, 20, 10, 5, 2, 1, 130, 71, 38, 20, 10, 5, 2, 1
OFFSET
1,2
COMMENTS
The triangle is the matrix square of the triangle A104762: T(n,k) = sum_{j= k..n} A104762(n,j)*A104762(j,k).
EXAMPLE
First few rows of the triangle:
1;
2, 1;
5, 2, 1;
10, 5, 2, 1;
20, 10, 5, 2, 1;
38, 20, 10, 5, 2, 1;
71, 38, 20, 10, 5, 2, 1;
...
CROSSREFS
Cf. A001629, A104762, A104763, A006478 (row sums).
Sequence in context: A207607 A146024 A146023 * A361681 A105084 A375100
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Mar 24 2005
STATUS
approved