A226825 Numbers of the form 7^j + 8^k, for j and k >= 0.

2, 8, 9, 15, 50, 57, 65, 71, 113, 344, 351, 407, 513, 519, 561, 855, 2402, 2409, 2465, 2913, 4097, 4103, 4145, 4439, 6497, 16808, 16815, 16871, 17319, 20903, 32769, 32775, 32817, 33111, 35169, 49575, 117650, 117657, 117713, 118161, 121745, 150417, 262145

Offset: 1

Author

T. D. Noe, Jun 19 2013

Keywords

• nonn

Links

• T. D. Noe, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A004050 (2^j + 3^k), A226806-A226832 (cases to 8^j + 9^k).

Programs

Mathematica

a = 7; b = 8; mx = 300000; Union[Flatten[Table[a^n + b^m, {m, 0, Log[b, mx]}, {n, 0, Log[a, mx - b^m]}]]]