

A032740


Numbers n such that n is a substring of 2^n.


10



6, 10, 35, 36, 37, 44, 49, 51, 60, 67, 72, 73, 82, 85, 89, 93, 179, 188, 190, 191, 226, 234, 252, 297, 312, 321, 356, 373, 391, 425, 429, 430, 438, 445, 451, 475, 478, 479, 486, 516, 519, 521, 526, 549, 551, 581, 582, 583, 598, 601, 603, 609, 613, 619, 627, 632, 642, 652, 653, 655, 660
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,1


LINKS

David W. Wilson, Table of n, a(n) for n = 1..10000


EXAMPLE

2^93 = 99035203142830421991929_93_792.


MATHEMATICA

d[n_] := IntegerDigits[n]; parQ[n_] := MemberQ[Partition[d[2^n], Length[x = d[n]], 1], x]; Select[Range[660], parQ] (* Jayanta Basu, Jun 17 2013 *)


PROG

(Haskell)
import Data.List (isInfixOf)
a032740 n = a032740_list !! (n1)
a032740_list = [x  x < [0..], show x `isInfixOf` (show $ 2 ^ x)]
 Reinhard Zumkeller, Jan 19 2014


CROSSREFS

Cf. A049301A049307.
Sequence in context: A192774 A218860 A242866 * A167330 A025629 A068889
Adjacent sequences: A032737 A032738 A032739 * A032741 A032742 A032743


KEYWORD

base,nonn,nice,easy


AUTHOR

Patrick De Geest, May 15 1998.


STATUS

approved



