A202264 Noncomposite numbers in which all substrings and reversal substrings are noncomposites.

1, 2, 3, 5, 7, 11, 13, 17, 31, 37, 71, 73, 113, 131, 311, 313, 373

Offset: 1

Author

Jaroslav Krizek, Dec 25 2011

Keywords

• nonn
• base
• fini
• full

Comments

Sequence is finite with 17 terms.

Supersequence of A202263, A085823.

Subsequence of A068669, A012883, A024770, A012883.

Examples

			All substrings and reversal substrings of 311 are noncomposites: 1, 3, 11, 13, 31, 113, 311.
		

Crossrefs

Cf. A202263 (primes in which all substrings and reversal substrings are primes), A202265 (nonprimes in which all substrings and reversal substrings are nonprimes), A202266 (composite numbers in which all substrings and reversal substrings are composites).