A113493 - OEIS

A113493

Digits of the concatenation of the first palindromic primes.

2, 3, 5, 7, 1, 1, 1, 0, 1, 1, 3, 1, 1, 5, 1, 1, 8, 1, 1, 9, 1, 3, 1, 3, 3, 5, 3, 3, 7, 3, 3, 8, 3, 7, 2, 7, 7, 5, 7, 7, 8, 7, 7, 9, 7, 9, 1, 9, 9, 2, 9, 1, 0, 3, 0, 1, 1, 0, 5, 0, 1, 1, 0, 6, 0, 1, 1, 1, 3, 1, 1, 1, 1, 4, 1, 1, 1, 2, 4, 2, 1, 1, 2, 7, 2, 1, 1, 2, 8, 2, 1, 1, 3, 3, 3, 1, 1, 3, 8, 3, 1, 1, 3, 9, 3

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

OFFSET

1,1

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

EXAMPLE

The sequence of palindromic primes (A002385) begins with 2, 3, 5, 7, 11, 101, 131, 151, 181, 191, 313, 353, 373, 383, 727, 757, 787, 797, ...; concatenating them gives the digit string 235711101131151181191313353373383727757787797..., whose digits are the terms of this sequence.

MATHEMATICA

Flatten[IntegerDigits/@Select[Prime[Range[3000]], PalindromeQ]] (* Harvey P. Dale, Oct 03 2021 *)

CROSSREFS

Cf. A002385.

Sequence in context: A126053 A109905 A230200 * A060420 A077648 A033308

Adjacent sequences: A113490 A113491 A113492 * A113494 A113495 A113496

KEYWORD

base,easy,nonn

AUTHOR

Giovanni Teofilatto, Jan 10 2006

EXTENSIONS

Edited by Jon E. Schoenfield, May 07 2021

STATUS

approved