login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A180693 Smallest power of 13 that begins with n. 4
1, 2197, 371293, 4826809, 51185893014090757, 62748517, 7056410014866816666030739693, 815730721, 91733330193268616658399616009, 10604499373, 112455406951957393129, 12646218552730347184269489080961456410641, 13, 1461920290375446110677, 15502932802662396215269535105521 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Robert Israel, Table of n, a(n) for n = 1..99

FORMULA

a(n) = 13^A180694(n). - Michel Marcus, Jan 18 2016

MAPLE

count:= 1:

A[1]:= 1:

for n from 1 while count < 99 do

x:= 13^n;

m:= ilog10(x);

for d from 0 to 1 do

   y:= floor(x/10^(m-d));

   if not assigned(A[y]) then

     count:= count+1;

     A[y]:= x;

   fi

od

od:

seq(A[i], i=1..99); # Robert Israel, Jan 17 2016

CROSSREFS

Cf. A180691, A180694, A180695.

Sequence in context: A109408 A202459 A017535 * A013799 A013868 A044884

Adjacent sequences:  A180690 A180691 A180692 * A180694 A180695 A180696

KEYWORD

base,nonn

AUTHOR

Daniel Mondot, Sep 18 2010

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified July 31 02:45 EDT 2016. Contains 275189 sequences.