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A095412
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Exponents n such that sum of decimal digits of 2^n is also a power of 2.
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5
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0, 1, 2, 3, 9, 36, 85, 176, 194, 200, 375, 1517, 1523, 3042, 5953, 6043, 6109, 12068, 12104, 96251, 193734, 386797, 387589, 1545477, 3092224, 3098800, 6188717, 6191693, 6199469
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OFFSET
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0,3
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LINKS
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Table of n, a(n) for n=0..28.
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EXAMPLE
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2^9=512 with sumdigit=8;2^36=68719476736 with sumdigit=64;
2^85=38685626227668133590597632 with sumdigit=128;
2^96251 has a decimal digit-sum of 131072.
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MATHEMATICA
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Do[If[IntegerQ[Log[2, Plus@@IntegerDigits[2^n]]], Print[n] ], {n, 0, 10^6}];
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CROSSREFS
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Cf. A001370 Sum of digits of 2^n.
Sequence in context: A073950 A064020 A204442 * A074428 A125052 A181139
Adjacent sequences: A095409 A095410 A095411 * A095413 A095414 A095415
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KEYWORD
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base,more,nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Jun 21 2004
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EXTENSIONS
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More terms from Ryan Propper (rpropper(AT)stanford.edu), Jun 13 2006
a(20)-a(22) from Ray Chandler, Jun 16 2006
a(23)-a(28) from Jon E. Schoenfield (jonscho(AT)hiwaay.net), Jul 22 2006
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STATUS
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approved
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