OFFSET
1,2
COMMENTS
Left column = A028387: (1, 5, 11, 19, 29, 41, 55, ...).
FORMULA
EXAMPLE
First few rows of the triangle:
1;
3, 2;
5, 5, 3;
7, 8, 7, 4;
9, 11, 11, 9, 5;
11, 14, 15, 14, 11, 6;
13, 17, 19, 19, 17, 13, 7;
...
CROSSREFS
KEYWORD
AUTHOR
Gary W. Adamson, Jan 27 2007
STATUS
approved