OFFSET
0,3
COMMENTS
Row n has 2n+1 terms.
EXAMPLE
1,
-1, 2, 2,
-1, -1, 3, 3, 3,
-1, -1, -1, 4, 4, 4, 4,
-1, -1, -1, -1, 5, 5, 5, 5, 5,
-1, -1, -1, -1, -1, 6, 6, 6, 6, 6, 6,
-1, -1, -1, -1, -1, -1, 7, 7, 7, 7, 7, 7, 7,
-1, -1, -1, -1, -1, -1, -1, 8, 8, 8, 8, 8, 8, 8, 8,
-1, -1, -1, -1, -1, -1, -1, -1, 9, 9, 9, 9, 9, 9, 9, 9, 9,
-1, -1, -1, -1, -1, -1, -1, -1, -1, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10
MATHEMATICA
Flatten[Table[Join[PadRight[{}, n, -1], PadRight[{}, n+1, n+1]], {n, 0, 9}]] (* Harvey P. Dale, May 07 2014 *)
CROSSREFS
KEYWORD
sign,tabf,easy
AUTHOR
Paul Curtz, Jun 16 2008
STATUS
approved