A083979 Smallest palindromic prime containing exactly n 8's.

181, 18181, 78887, 1880881, 9888889, 188868881, 188888881, 18888588881, 1488888888841, 7888886888887, 3888888888883, 188888858888881, 188888888888881, 38888888088888883, 1688888888888888861, 3888888882888888883, 128888888888888888821

Offset

1,1

Links

Chai Wah Wu, Table of n, a(n) for n = 1..500

Mathematica

Table[d = 8; i = 1;
While[ x = IntegerDigits[Prime[i]];
  x != Reverse[x] || Count[x, d] != n , i++];
FromDigits[x], {n, 1, 5}]  (* Robert Price, Mar 25 2019 *)
Module[{prs=Select[Prime[Range[105*10^5]], PalindromeQ]}, Table[ SelectFirst[ prs, DigitCount[ #, 10, 8]==n&], {n, 6}]] (* The program generates the first 6 terms of the sequence. *) (* Harvey P. Dale, May 11 2022 *)

Crossrefs

Cf. A083972, A083973, A083974, A083975, A083976, A083977, A083978, A083980, A083981.

Sequence in context: A212938 A070250 A226714 * A179408 A224991 A189342

Adjacent sequences: A083976 A083977 A083978 * A083980 A083981 A083982

Keyword

base,nonn

Author

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), May 21 2003

Extensions

Corrected and extended by Giovanni Resta, Feb 08 2006

Status

approved