OFFSET
1,2
COMMENTS
EXAMPLE
First few rows of the triangle:
1;
2, 2;
2, 0, 2;
3, 3, 0, 3;
2, 0, 0, 0, 2;
4, 4, 4, 0, 0, 4;
2, 0, 0, 0, 0, 0, 2;
4, 4, 0, 4, 0, 0, 0, 4;
...
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Gary W. Adamson, May 18 2007
EXTENSIONS
a(56) corrected and more terms from Georg Fischer, Jun 05 2023
STATUS
approved