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

 

Logo

Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 5000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A134596 The largest n-digit primeval number A072857. 3
2, 37, 137, 1379, 13679, 123479, 1234679, 12345679, 102345679, 1123456789, 10123456789 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Former definition: The least n-digit number m (i.e., m >= 10^(n-1)) which yields A076730(n) = the maximum, for m < 10^n, of A039993(m) = number of primes that can be formed using some or all digits of m.

A subsequence of A072857, consisting in the largest n-digit term of the latter, for n=1,2,3,.... - M. F. Hasler, Mar 12 2014

LINKS

Table of n, a(n) for n=1..11.

M. Keith, Integers containing many embedded primes

FORMULA

a(n) = max { m in A072857, m < 10^n }. - M. F. Hasler, Mar 12 2014

CROSSREFS

Cf. A039993, A134597.

Sequence in context: A262182 A142077 A107182 * A139119 A244757 A053788

Adjacent sequences:  A134593 A134594 A134595 * A134597 A134598 A134599

KEYWORD

nonn,base,more

AUTHOR

N. J. A. Sloane, Jan 25 2008

EXTENSIONS

Link fixed by Charles R Greathouse IV, Aug 13 2009

Definition reworded and values of a(6)-a(11) added by M. F. Hasler, Mar 11 2014

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified December 6 06:58 EST 2016. Contains 278775 sequences.