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A031147 Smallest power of 2 containing n zeros. 3
1, 1024, 4398046511104, 8796093022208, 604462909807314587353088, 309485009821345068724781056, 1267650600228229401496703205376, 5070602400912917605986812821504, 784637716923335095479473677900958302012794430558004314112 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..8.

FORMULA

a(n) = 2^A031147(n). - M. F. Hasler, Jun 15 2018

PROG

(PARI) A031147(n)=for(k=n, oo, #select(d->!d, digits(2^k))==n&&return(2^k)) \\ M. F. Hasler, Jun 15 2018

CROSSREFS

Cf. A031146.

Sequence in context: A017302 A017422 A017554 * A087932 A045035 A060948

Adjacent sequences:  A031144 A031145 A031146 * A031148 A031149 A031150

KEYWORD

nonn,easy,base

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Erich Friedman.

a(8) added by M. F. Hasler, Jun 16 2018

STATUS

approved

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Last modified February 28 06:55 EST 2020. Contains 332321 sequences. (Running on oeis4.)