OFFSET
1,2
COMMENTS
The triangle is obtained by subtracting the triangle A094930 from
its square root (also described in A094930) and then dividing each element of column m through 3*m-1.
For the first three rows n=1 to 3 this yields for example:
4;.................2;............2......................1;
14,25;......minus..2,5;.......=..12,20;......->.divide..6,4;
30,65,64;..........2,5,8;........28,60,56;..............14;12,7;
PROG
(Python)
def A096038(n, m):
return (3*n**2-3*m**2+5*m-4+n)//2
print( [A096038(n, m) for n in range(20) for m in range(1, n+1)] )
# R. J. Mathar, Oct 11 2009
CROSSREFS
KEYWORD
AUTHOR
Gary W. Adamson, Jun 17 2004
EXTENSIONS
Edited, T(3,2) corrected, and extended by R. J. Mathar, Oct 11 2009
STATUS
approved