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A138359
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List of quadruples of strictly non-palindromic primes without an ordinary prime in between them.
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2
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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
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| For triples of this kind see A138358
For quintuples of this kind see A138360
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REFERENCES
| Karl Hovekamp, Palindromzahlen in adischen Zahlensystemen, 2004
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LINKS
| K. Hovekamp, Palindromic numbers in different bases.
K. Hovekamp, Strictly non-palindromic prime quintuple, quadruple and triple up to 1 billion
Wikipedia, Strictly non-palindromic numbers.
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EXAMPLE
| 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.
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CROSSREFS
| Cf. A138358, A138360, A138329, A016038, A047811, A016038.
Sequence in context: A204668 A115959 A045937 * A178553 A194355 A182896
Adjacent sequences: A138356 A138357 A138358 * A138360 A138361 A138362
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KEYWORD
| base,nonn,tabf
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AUTHOR
| Karl K. Hovekamp (karl.hovekamp(AT)web.de), Mar 16 2008
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