OFFSET
1,3
COMMENTS
Row sums are the triangular numbers 1, 3, 6, 10, 15, 21, 28, ...; see A000217.
FORMULA
EXAMPLE
From Philippe Deléham, Oct 28 2011: (Start)
Triangle begins:
1;
0, 3;
1, 0, 5;
0, 3, 0, 7;
1, 0, 5, 0, 9;
0, 3, 0, 7, 0, 11;
1, 0, 5, 0, 9, 0, 13; ...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Sep 21 2007
EXTENSIONS
Corrected and extended by Philippe Deléham, Oct 28 2011
STATUS
approved