The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A113493 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing all changes.

A113493

Digits of the concatenation of the first palindromic primes.
(history; published version)

#10 by Harvey P. Dale at Sun Oct 03 15:41:19 EDT 2021

STATUS

editing

approved

#9 by Harvey P. Dale at Sun Oct 03 15:41:16 EDT 2021

LINKS

Harvey P. Dale, <a href="/A113493/b113493.txt">Table of n, a(n) for n = 1..1000</a>

MATHEMATICA

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

STATUS

approved

editing

#8 by Joerg Arndt at Sat May 08 01:42:05 EDT 2021

STATUS

reviewed

approved

#7 by Michel Marcus at Sat May 08 00:16:39 EDT 2021

STATUS

proposed

reviewed

#6 by Jon E. Schoenfield at Fri May 07 23:50:52 EDT 2021

STATUS

editing

proposed

#5 by Jon E. Schoenfield at Fri May 07 23:49:25 EDT 2021

COMMENTS

Concatenate palindromic primes.

STATUS

approved

editing

Discussion

Fri May 07

23:50

Jon E. Schoenfield: Once again, I moved my mouse to the "These changes are ready..." button, and just as I clicked, the page jumped just far enough to move the "I approve these changes..." button to the position where my mouse pointer was, resulting in accidental approval of the changes.  >:-(

#4 by Jon E. Schoenfield at Fri May 07 23:48:58 EDT 2021

STATUS

editing

approved

#3 by Jon E. Schoenfield at Fri May 07 23:48:24 EDT 2021

NAME

Digits of the concatenation of the first n palindromic primes.

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.

CROSSREFS

Cf. A002385.

EXTENSIONS

Edited by Jon E. Schoenfield, May 07 2021

STATUS

approved

editing

#2 by Russ Cox at Fri Mar 30 18:40:02 EDT 2012

AUTHOR

_Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), _, Jan 10 2006

Discussion

Fri Mar 30

18:40

OEIS Server: https://oeis.org/edit/global/226

#1 by N. J. A. Sloane at Tue Jan 24 03:00:00 EST 2006

NAME

Digits of first n palindromic primes.

DATA

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

OFFSET

1,1

COMMENTS

Concatenate palindromic primes.

KEYWORD

base,easy,nonn,new

AUTHOR

Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Jan 10 2006

STATUS

approved