A099658 a(n) is the smallest prime greater than 4(10^n - 1)/9.

2, 5, 47, 449, 4447, 44449, 444449, 4444469, 44444453, 444444457, 4444444447, 44444444497, 444444444461, 4444444444493, 44444444444459, 444444444444461, 4444444444444463, 44444444444444461, 444444444444444469, 4444444444444444537, 44444444444444444447

Offset

0,1

Comments

a(n) = smallest prime > A002278(n).

Links

Table of n, a(n) for n=0..20.

Example

n=4: 44 is followed by 47.

Mathematica

Table[NextPrime[4*(10^n-1)/9], {n, 0, 35}]

Crossrefs

Cf. A003618, A003617, A096497, A096498, A068104, A002275-A002283, A099656-A099668.

Sequence in context: A163666 A093552 A060808 * A357246 A244014 A102011

Adjacent sequences: A099655 A099656 A099657 * A099659 A099660 A099661

Keyword

base,nonn

Author

Labos Elemer, Nov 17 2004

Extensions

Checked by N. J. A. Sloane, Jan 27 2007

Mathematica program edited by Harvey P. Dale, Jul 16 2024

Status

approved