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Sums of 3 distinct powers of 4.
5

%I #11 Jul 13 2022 05:57:55

%S 21,69,81,84,261,273,276,321,324,336,1029,1041,1044,1089,1092,1104,

%T 1281,1284,1296,1344,4101,4113,4116,4161,4164,4176,4353,4356,4368,

%U 4416,5121,5124,5136,5184,5376,16389,16401,16404,16449,16452,16464,16641,16644,16656,16704

%N Sums of 3 distinct powers of 4.

%H Amiram Eldar, <a href="/A038471/b038471.txt">Table of n, a(n) for n = 1..10000</a>

%t Union[Total/@Subsets[4^Range[0,10],{3}]] (* _Harvey P. Dale_, Oct 20 2012 *)

%Y Base 4 interpretation of A038445.

%Y Cf. A000302, A038470, A038472, A038473.

%K nonn,easy

%O 1,1

%A _Olivier GĂ©rard_

%E Offset corrected by _Amiram Eldar_, Jul 13 2022