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A062220 Smoothly undulating palindromic primes of the form (38*10^a(n)-83)/99. 0
3, 9, 15, 17, 21, 57, 4233, 4335, 13221, 26447, 29897, 91997 (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..12.

P. De Geest, SUPP Reference Table - 383

Index entries for sequences related to smoothly undulating palindromic primes

EXAMPLE

a(n)=21 -> (38*10^21-83)/99 = 383838383838383838383.

CROSSREFS

Cf. A062209-A062232, A059758, A032758.

Sequence in context: A061966 A085328 A291347 * A043381 A100331 A155764

Adjacent sequences:  A062217 A062218 A062219 * A062221 A062222 A062223

KEYWORD

nonn,base

AUTHOR

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

EXTENSIONS

a(12)=91997 from Ray Chandler, Jul 29 2011

Edited by Ray Chandler, Aug 17 2011

STATUS

approved

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Last modified September 23 21:30 EDT 2017. Contains 292392 sequences.