OFFSET
0,1
LINKS
T. D. Noe, Rows n = 0..100 of triangle, flattened
FORMULA
T(n,m) = 11^n + 11^m, n = 0, 1, 2, 3, ..., m = 0, 1, 2, 3, ... n.
Bivariate g.f.: (2 - 12*x)/((1 - x)*(1 - 11*x)*(1 - 11*x*y)). - J. Douglas Morrison, Jul 26 2021
EXAMPLE
T(2,0) = 11^2 + 11^0 = 122.
Table T(n,m) begins:
2;
12, 22;
122, 132, 242;
1332, 1342, 1452, 2662;
14642, 14652, 14762, 15972, 29282;
...
MATHEMATICA
t = 11^Range[0, 9]; Select[Union[Flatten[Table[i + j, {i, t}, {j, t}]]], # <= t[[-1]] + 1 &] (* T. D. Noe, Oct 09 2011 *)
CROSSREFS
Cf. A001020 (powers of 11).
Equals twice A073219.
KEYWORD
AUTHOR
Jeremy Gardiner, Jul 20 2002
STATUS
approved