A073215 Sum of two powers of 23.

2, 24, 46, 530, 552, 1058, 12168, 12190, 12696, 24334, 279842, 279864, 280370, 292008, 559682, 6436344, 6436366, 6436872, 6448510, 6716184, 12872686, 148035890, 148035912, 148036418, 148048056, 148315730, 154472232, 296071778

Offset

0,1

Links

G. C. Greubel, Table of n, a(n) for n = 0..999 [Offset changed to 0 by Georg Fischer, Mar 01 2022]

Formula

T(n, m) = 23^n + 23^m, for n >= 0 and m in [0..n].

Bivariate g.f.: (2 - 24*x) / ((1 - x) * (1 - 23*x) * (1 - 23*x*y)). - J. Douglas Morrison, Jul 29 2021

Example

T(2,0) = 23^2 + 23^0 = 530.
Table begins:
       2;
      24,     46;
     530,    552,   1058;
   12168,  12190,  12696,  24334;
  279842, 279864, 280370, 292008, 559682;
  ...

Mathematica

With[{nn=30}, Take[Union[Total/@Tuples[23^Range[0, nn], 2]], nn]] (* Harvey P. Dale, Oct 16 2017 *)

Crossrefs

Cf. A009967.

Equals twice A072822.

Sums of two powers of n: A073423 (0), A007395 (1), A173786 (2), A055235 (3), A055236 (4), A055237 (5), A055257 (6), A055258 (7), A055259 (8), A055260 (9), A052216 (10), A073211 (11), A194887 (12), A072390 (13), A055261 (16), A073213 (17), A073214 (19).

Sequence in context: A119070 A181283 A368360 * A111035 A349188 A249277

Adjacent sequences: A073212 A073213 A073214 * A073216 A073217 A073218

Keyword

easy,nonn,tabl

Author

Jeremy Gardiner, Jul 20 2002

Status

approved