A226825 - OEIS

%I #3 Jun 19 2013 02:28:01

%S 2,8,9,15,50,57,65,71,113,344,351,407,513,519,561,855,2402,2409,2465,

%T 2913,4097,4103,4145,4439,6497,16808,16815,16871,17319,20903,32769,

%U 32775,32817,33111,35169,49575,117650,117657,117713,118161,121745,150417,262145

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

%H T. D. Noe, <a href="/A226825/b226825.txt">Table of n, a(n) for n = 1..10000</a>

%t 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]}]]]

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

%K nonn

%O 1,1

%A _T. D. Noe_, Jun 19 2013