A222725 -id:A222725 - cp's OEIS frontend

A043038 Base-10 palindromes that starts with 3.

3, 33, 303, 313, 323, 333, 343, 353, 363, 373, 383, 393, 3003, 3113, 3223, 3333, 3443, 3553, 3663, 3773, 3883, 3993, 30003, 30103, 30203, 30303, 30403, 30503, 30603, 30703, 30803, 30903, 31013, 31113, 31213, 31313, 31413, 31513, 31613, 31713, 31813, 31913

Offset: 1

Clark Kimberling

Subsequence of A002113 (palindromic numbers). Union of A222725 (palindromic primes starting with a digit 3) and A222726 (palindromic composite numbers starting with a digit 3). - Jaroslav Krizek, Mar 12 2013

Jaroslav Krizek, Table of n, a(n) for n = 1..2222

okQ[n_]:=Module[{idn=IntegerDigits[n]}, First[idn]==3 && n==FromDigits[Reverse[idn]]]; Select[Range[40000],okQ] (* Harvey P. Dale, Jan 14 2011 *)

A222726 Palindromic composite numbers starting with a digit 3.

Original entry on oeis.org

33, 303, 323, 333, 343, 363, 393, 3003, 3113, 3223, 3333, 3443, 3553, 3663, 3773, 3883, 3993, 30003, 30303, 30503, 30603, 30903, 31213, 31313, 31413, 31513, 31613, 31713, 31813, 31913, 32023, 32123, 32223, 32523, 32623, 32723, 32823, 32923, 33033, 33133, 33233

Offset: 1

Jaroslav Krizek, Mar 09 2013

Subsequence of A032350 (palindromic nonprime numbers) and A002113 (palindromic numbers). Complement of A222725 (palindromic primes starting with a digit 3) with respect to A043038 (palindromic numbers starting with a digit 3).

Jaroslav Krizek, Table of n, a(n) for n = 1..1021

Cf. A032350, A002113, A222725, A043038.

cp's OEIS Frontend

A043038 Base-10 palindromes that starts with 3.

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