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Powers of 6 with digit sum also a power of 6.
8

%I #13 Dec 24 2022 04:52:44

%S 1,6,279936,1679616,10077696,60466176,13060694016,

%T 4849687664788584363858837602739217760256,

%U 174588755932389037098918153698611839369216

%N Powers of 6 with digit sum also a power of 6.

%t Select[6^(Range[54]-1),IntegerQ[Log[6,Total[IntegerDigits[#]]]]&] (* _Stefano Spezia_, Dec 23 2022 *)

%Y Cf. A066002, A067499, A067500, A067501, A067502.

%K base,easy,nonn

%O 1,2

%A _Amarnath Murthy_, Feb 11 2002

%E More terms from _Sascha Kurz_, Mar 18 2002