A226818 Numbers of the form 5^j + 7^k, for j and k >= 0.

2, 6, 8, 12, 26, 32, 50, 54, 74, 126, 132, 174, 344, 348, 368, 468, 626, 632, 674, 968, 2402, 2406, 2426, 2526, 3026, 3126, 3132, 3174, 3468, 5526, 15626, 15632, 15674, 15968, 16808, 16812, 16832, 16932, 17432, 18026, 19932, 32432, 78126, 78132, 78174, 78468

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).

Cf. A226792 ((5^j + 7^k)/2).

Programs

Mathematica

a = 5; b = 7; mx = 80000; Union[Flatten[Table[a^n + b^m, {m, 0, Log[b, mx]}, {n, 0, Log[a, mx - b^m]}]]]