A138359 List of quadruples of strictly non-palindromic primes without an ordinary prime in between them.

44449, 44453, 44483, 44491, 120811, 120817, 120823, 120829, 315037, 315047, 315059, 315067, 583069, 583087, 583127, 583139, 617411, 617429, 617447, 617453, 1553423, 1553429, 1553437, 1553467, 1712329, 1712339, 1712353, 1712369

Offset: 1

Author

Karl Hovekamp, Mar 16 2008

Keywords

• base
• nonn
• tabf

Comments

For triples of this kind, see A138358.

For quintuples of this kind, see A138360.

Examples

			Primes:
...
44417 palindromic in bases 50, 106, 135 and 141
44449 strictly non-palindromic
44453 strictly non-palindromic
44483 strictly non-palindromic
44491 strictly non-palindromic
44497 palindromic in base 67 and base 206
...
So {44449, 44453, 44483, 44491} is the first quadruple of strictly non-palindromic primes.
		

References

• Karl Hovekamp, Palindromzahlen in adischen Zahlensystemen, 2004

Links

• K. Hovekamp, Palindromic numbers in different bases.
• K. Hovekamp, Strictly non-palindromic prime 5-tuple, quadruple and triple up to 1 billion
• Wikipedia, Strictly non-palindromic numbers.

Crossrefs

Cf. A138358, A138360, A138329, A016038, A047811, A016038.