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A073215
Sum of two powers of 23.
5
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
KEYWORD
easy,nonn,tabl
AUTHOR
Jeremy Gardiner, Jul 20 2002
STATUS
approved