A208362 "2-ply" palindromic primes.

11, 101, 131, 151, 181, 191, 313, 353, 373, 383, 727, 757, 787, 797, 919, 929, 10301, 10501, 10601, 11311, 11411, 12421, 12721, 12821, 13331, 13831, 13931, 14341, 14741, 15451, 15551, 16061, 16361, 16561, 16661, 17471, 17971, 18181, 18481, 19391, 19891, 19991, 30103, 30203, 30403, 30703, 30803

Offset

1,1

Comments

From the Ribenboim book: palindromic primes whose base 10 length is a palindromic prime whose base 10 length is NOT a palindromic prime.

References

Paulo Ribenboim, The New Book of Prime Number Records, Springer-Verlag New York Inc., 1996, pages 160-161.

Links

Alvin Hoover Belt, Table of n, a(n) for n = 1..151

Example

11 is a palindromic prime of 2 digits, 2 is a palindromic prime of 1 digit, 1 is NOT a palindromic prime.

Crossrefs

Cf. A002385, A208361 (base-10 length of these numbers), A208363 (palindromic primes with these as the base 10 lengths).

Sequence in context: A113654 A066592 A316604 * A159613 A062332 A222723

Adjacent sequences: A208359 A208360 A208361 * A208363 A208364 A208365

Keyword

nonn,base

Author

Alvin Hoover Belt, Feb 25 2012

Status

approved