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A226830 Numbers of the form 6^j + 9^k, for j and k >= 0. 1

%I #3 Jun 19 2013 02:28:50

%S 2,7,10,15,37,45,82,87,117,217,225,297,730,735,765,945,1297,1305,1377,

%T 2025,6562,6567,6597,6777,7777,7785,7857,8505,14337,46657,46665,46737,

%U 47385,53217,59050,59055,59085,59265,60345,66825,105705,279937,279945,280017

%N Numbers of the form 6^j + 9^k, for j and k >= 0.

%H T. D. Noe, <a href="/A226830/b226830.txt">Table of n, a(n) for n = 1..10000</a>

%t a = 6; b = 9; 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

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Last modified April 25 16:45 EDT 2024. Contains 371989 sequences. (Running on oeis4.)