A077799 - OEIS

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A077799

Numbers m such that a smoothly undulating palindromic prime of the form (rs*10^m-sr)/99 exists, where r and s are two distinct digits and rs and sr denote concatenations of those digits.

2

3, 5, 7, 9, 11, 15, 17, 21, 23, 25, 27, 31, 33, 37, 39, 43, 45, 51, 55, 57, 63, 65, 71, 77, 81, 83, 89, 95, 99, 109, 133, 139, 143, 145, 149, 161, 163, 195, 209, 219, 225, 229, 237, 243, 245, 277, 315, 357, 479, 513, 515, 537, 551, 561, 567, 583, 627, 849, 857

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Ray Chandler, Table of n, a(n) for n = 1..146

P. De Geest, SUPP's Sorted By Length

Index entries for sequences related to smoothly undulating palindromic primes

CROSSREFS

Cf. A062209-A062232, A059758, A032758.

Sequence in context: A209492 A118360 A331588 * A260124 A376241 A201646

Adjacent sequences: A077796 A077797 A077798 * A077800 A077801 A077802

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, Nov 16 2002

EXTENSIONS

Edited by Ray Chandler, Aug 17 2011

Name clarified by Sean A. Irvine, Jun 14 2025

STATUS

approved