OFFSET
1,1
COMMENTS
EXAMPLE
The triangle has 2n columns in row n. It starts:
2, 1;
3, 3, 1, 1;
4, 4, 4, 1, 1, 1;
5, 5, 5, 5, 1, 1, 1, 1;
MATHEMATICA
Flatten[Table[Join[PadRight[{}, n, n+1], PadRight[{}, n, 1]], {n, 12}]] (* Harvey P. Dale, Feb 18 2013 *)
CROSSREFS
KEYWORD
nonn,easy,tabf
AUTHOR
Paul Curtz, Mar 19 2009
EXTENSIONS
Edited by R. J. Mathar, Apr 09 2009
STATUS
approved