OFFSET
1,2
COMMENTS
FORMULA
G.f. = G(t,z) = Sum_{k>=1} t^k*z^k*(k-(k-1)*z^k)/(1-z^k)^2. - Emeric Deutsch, Apr 17 2007
EXAMPLE
First few rows of the triangle:
1;
2, 2;
3, 0, 3;
4, 3, 0, 4;
5, 0, 0, 0, 5;
6, 4, 4, 0, 0, 6;
7, 0, 0, 0, 0, 0, 7;
...
MAPLE
T:=proc(n, k) if n mod k = 0 then n/k+k-1 else 0 fi end: for n from 1 to 16 do seq(T(n, k), k=1..n) od; # yields sequence in triangular form - Emeric Deutsch, Apr 17 2007
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Apr 05 2007
EXTENSIONS
Edited by Emeric Deutsch, Apr 17 2007
STATUS
approved