

A104766


Triangle T(n,k) = A001629(nk+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
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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).


LINKS

Table of n, a(n) for n=1..36.


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 * A105084 A126125 A221876
Adjacent sequences: A104763 A104764 A104765 * A104767 A104768 A104769


KEYWORD

nonn,tabl


AUTHOR

Gary W. Adamson, Mar 24 2005


STATUS

approved



