A062213 Numbers k such that the smoothly undulating palindromic number (17*10^k - 71)/99 is a prime.

31, 37, 4885

Offset: 1

Author

Patrick De Geest and Hans Rosenthal (Hans.Rosenthal(AT)t-online.de), Jun 15 2001

Keywords

• nonn
• bref
• base

Comments

Prime versus probable prime status and proofs are given in the author's table.

No further terms < 100000. - Ray Chandler, Aug 17 2011

Examples

			k=31 -> (17*10^31 - 71)/99 = 1717171717171717171717171717171.
		

Links

• P. De Geest, SUPP Reference Table - 171
• Index entries for sequences related to smoothly undulating palindromic primes

Crossrefs

Cf. A062209-A062232, A059758, A032758.

Extensions

Edited by Ray Chandler, Aug 17 2011