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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A145679 Lower limit of backward value of 2^n and n!. 2
2, 1, 1, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 0, 1, 0, 1, 0, 0, 0, 1, 1, 1, 1, 0, 1, 1, 1, 1, 0, 0, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

For n!, omitting the trailing sequence zeros. - Simon Plouffe, Mar 05 2017

The terms are deduced from sequence A023415.

The sum of constants in A158624 and A158625 is conjectured to be 11 exactly.

LINKS

Table of n, a(n) for n=1..60.

PROG

(Python)

# lower limit of backward value of 2^n

a, i=2, 0; x=a

while 1:

     i+=1; print x, ', ' ,

     if a%2**(i+1) == 0: x=0

     else: x=1; a+=10**i

# Cezary Glowacz, Mar 11 2017

CROSSREFS

Cf. A000079, A004154, A023415, A158624, A158625.

Sequence in context: A089311 A086784 A104162 * A007273 A016319 A287156

Adjacent sequences:  A145676 A145677 A145678 * A145680 A145681 A145682

KEYWORD

nonn,base,more

AUTHOR

Simon Plouffe, Mar 23 2009

EXTENSIONS

More terms from Cezary Glowacz, Feb 26 2017

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 23 05:56 EDT 2019. Contains 328335 sequences. (Running on oeis4.)