A196023 Primes that are palindromes and have 666 in the middle.

16661, 76667, 3166613, 3466643, 7466647, 7666667, 145666541, 148666841, 152666251, 155666551, 169666961, 176666671, 181666181, 304666403, 305666503, 307666703, 308666803, 329666923, 347666743, 349666943, 373666373, 374666473, 383666383, 391666193, 397666793

Offset

1,1

References

N. J. A. Sloane, personal communication, 2011.

Links

Arkadiusz Wesolowski, Table of n, a(n) for n = 1..1000

G. L. Honaker, Jr. and Chris Caldwell, Prime Curios! 3166613

Wikipedia, Number of the Beast

Index entries for sequences related to palindromes

Mathematica

Select[Table[FromDigits@Join[Flatten@IntegerDigits@PadLeft[{666}, 2, n], Reverse@IntegerDigits[n]], {n, 397}], PrimeQ] (* Arkadiusz Wesolowski, Dec 03 2011 *)

Crossrefs

Subsequence of A131645.

Sequence in context: A349773 A232450 A317179 * A108843 A232449 A260312

Adjacent sequences: A196020 A196021 A196022 * A196024 A196025 A196026

Keyword

base,nonn

Author

Arkadiusz Wesolowski, Sep 26 2011

Status

approved