OFFSET
0,2
FORMULA
The triangle is extracted from the product of lower triangular matrices (with the rest of the terms all zeros): G * R (or R * G); G = [1; 3, 1; 1, 3, 1; 3, 1, 3, 1;...]; R = [1; 1, 1; 1, 1, 1;...].
EXAMPLE
The first few rows are:
1;
4, 1;
5, 4, 1;
8, 5, 4, 1;
9, 8, 5, 4, 1;
...
CROSSREFS
KEYWORD
AUTHOR
Gary W. Adamson, Mar 16 2005
STATUS
approved