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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: A106947 A142077 A107182 * A139119 A053788 A078976

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

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Last modified April 17 20:01 EDT 2014. Contains 240655 sequences.