A134596 The largest n-digit primeval number A072857.

2, 37, 137, 1379, 13679, 123479, 1234679, 12345679, 102345679, 1123456789, 10123456789

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.

Subsequence of A072857 consisting of the largest terms of given length. - 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

Prog

(PARI) A134596(n, A=A072857)=vecmax(select(t->logint(t, 10)+1==n, A)) \\ where A072857 must comprise all n digit terms of that sequence. - M. F. Hasler, Oct 14 2019
(Python) # see linked program in A076449

Crossrefs

Cf. A039993, A072857, A076730, A134597, A076449.

Sequence in context: A262182 A142077 A107182 * A139119 A244757 A298476

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