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

Author

Labos Elemer, Nov 17 2004

Keywords

• base
• nonn

Comments

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

Examples

			n=4: 44 is followed by 47.
		

Crossrefs

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

Programs

Mathematica

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

Extensions

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

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