OFFSET
1,2
COMMENTS
Row sums = powers of 5: (1, 5, 25, 125, ...).
Left border = A015521: (1, 3, 13, 51, 205, 819, ...).
FORMULA
EXAMPLE
First few rows of the triangle:
1;
3, 2;
13, 9, 3;
51, 52, 18, 4;
205, 255, 130, 30, 5;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Jun 12 2007
STATUS
approved