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A062221 Smoothly undulating palindromic primes of the form (72*10^a(n)-27)/99. 0
3, 5, 9, 17, 71, 99, 243, 7595, 9273, 53847 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

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

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

LINKS

Table of n, a(n) for n=1..10.

P. De Geest, SUPP Reference Table - 727

Index entries for sequences related to smoothly undulating palindromic primes

EXAMPLE

a(n)=17 -> (72*10^17-27)/99 = 72727272727272727.

CROSSREFS

Cf. A062209-A062232, A059758, A032758.

Sequence in context: A135729 A118330 A268212 * A074861 A281852 A120941

Adjacent sequences:  A062218 A062219 A062220 * A062222 A062223 A062224

KEYWORD

nonn,base

AUTHOR

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

EXTENSIONS

53847 from Patrick De Geest, Aug 06 2004.

Edited by Ray Chandler, Aug 17 2011

STATUS

approved

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Last modified September 23 21:16 EDT 2017. Contains 292391 sequences.