OFFSET
1,2
COMMENTS
Row sums = A133600: (1, 4, 7, 16, 28, 64, 112, ...).
FORMULA
EXAMPLE
First few rows of the triangle:
1;
3, 1;
3, 3, 1;
3, 7, 5, 1;
3, 9, 10, 5, 1;
3, 13, 22, 18, 7, 1;
...
MAPLE
A133599aux := proc(n, k)
end proc:
A133599 := proc(n, k)
add(A133599aux(n, j)*binomial(j-1, k-1), j=k..n) ;
end proc: # R. J. Mathar, Jun 20 2015
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Sep 18 2007
STATUS
approved