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Numbers of the form (3^j + 5^k)/2, for j and k >= 0.
1

%I #4 Jun 19 2013 13:09:50

%S 1,2,3,4,5,7,13,14,16,17,26,41,43,53,63,64,67,76,103,122,124,134,184,

%T 313,314,317,326,353,365,367,377,427,434,677,1094,1096,1106,1156,1406,

%U 1563,1564,1567,1576,1603,1684,1927,2656,3281,3283,3293,3343,3593

%N Numbers of the form (3^j + 5^k)/2, for j and k >= 0.

%t a = 3; b = 5; mx = 8000; Union[Flatten[Table[a^n + b^m, {m, 0, Log[b, mx]}, {n, 0, Log[a, mx - b^m]}]]]/2

%Y Cf. A226809 (3^j + 5^k).

%K nonn

%O 1,2

%A _T. D. Noe_, Jun 19 2013