OFFSET
1,3
COMMENTS
Row sums = the pentagonal numbers, A000326: 1, 5, 12, 22, 35, 51, ...
FORMULA
EXAMPLE
First few rows of the triangle:
1;
1, 4;
1, 2, 9;
1, 2, 3, 16;
1, 2, 3, 4, 25;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, Feb 14 2007
STATUS
approved