A222726 Palindromic composite numbers starting with a digit 3.

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

Author

Jaroslav Krizek, Mar 09 2013

Keywords

• nonn
• base

Comments

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).

Links

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

Crossrefs

Cf. A032350, A002113, A222725, A043038.