A043036 -id:A043036 - cp's OEIS frontend

A222723 Palindromic primes starting with a digit 1.

11, 101, 131, 151, 181, 191, 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, 1003001, 1008001, 1022201, 1028201, 1035301, 1043401

Offset: 1

Jaroslav Krizek, Mar 03 2013

Subsequence of A002385 (palindromic primes) and A002113 (palindromic numbers). Complement of A222724 (palindromic nonprime numbers starting with a digit 1) with respect to A043036 (palindromic numbers starting with a digit 1).

Jaroslav Krizek, Table of n, a(n) for n = 1..1000

Cf. A002385, A002113, A222724, A043036.

Select[Prime[Range[85000]],PalindromeQ[#]&&IntegerDigits[#][[1]]==1&] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Mar 14 2018 *)

A222724 Palindromic nonprime numbers starting with a digit 1.

Original entry on oeis.org

1, 111, 121, 141, 161, 171, 1001, 1111, 1221, 1331, 1441, 1551, 1661, 1771, 1881, 1991, 10001, 10101, 10201, 10401, 10701, 10801, 10901, 11011, 11111, 11211, 11511, 11611, 11711, 11811, 11911, 12021, 12121, 12221, 12321, 12521, 12621, 12921, 13031, 13131, 13231

Offset: 1

Jaroslav Krizek, Mar 03 2013

Subsequence of A032350 (palindromic nonprime numbers) and A002113 (palindromic numbers). Complement of A222723 (palindromic primes starting with a digit 1) with respect to A043036 (palindromic numbers starting with a digit 1).

Jaroslav Krizek, Table of n, a(n) for n = 1..1000

Cf. A032350, A002113, A222723, A043036.

cp's OEIS Frontend

A222723 Palindromic primes starting with a digit 1.

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