A164054 The index values of the smallest and the largest n-digit primes.

1, 4, 5, 25, 26, 168, 169, 1229, 1230, 9592, 9593, 78498, 78499, 664579, 664580, 5761455, 5761456, 50847534, 50847535, 455052511, 455052512, 4118054813, 4118054814, 37607912018, 37607912019, 346065536839, 346065536840, 3204941750802, 3204941750803, 29844570422669, 29844570422670

Offset

1,2

Comments

Union of A006880 (except 0) and A090226. - Parthasarathy Nambi, Sep 19 2009

Links

Table of n, a(n) for n=1..31.

Example

The index value of the smallest six digit prime number is 9593. The index value of the largest six digit prime number is 78498.

Crossrefs

Cf. A000040, A006880, A090226.

Sequence in context: A042601 A219515 A248246 * A333321 A047168 A220538

Adjacent sequences: A164051 A164052 A164053 * A164055 A164056 A164057

Keyword

base,nonn

Author

Parthasarathy Nambi, Aug 08 2009

Extensions

More terms from Amiram Eldar, Nov 30 2019

Status

approved