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URL: https://oeis.org/A186893

⇱ A186893 - OEIS

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A186893
Numbers m such that the Stern polynomial B(m,x) is irreducible and self-reciprocal.
1
1, 3, 7, 11, 31, 59, 127, 251, 377, 433, 1019, 1969, 2047, 3449, 4091, 8191, 11327, 15737, 16379, 32689, 36737, 64889, 65531
OFFSET
1,2
COMMENTS
This appears to be numbers of the forms 4^k-5 for k>1, 2^p-1 for odd primes, and 377, 433, 1969, 3449, 11327,....
FORMULA
Intersection of A186890 and A186891.
CROSSREFS
Sequence in context: A361680 A091938 A333424 * A389139 A051919 A119175
KEYWORD
nonn,more
AUTHOR
T. D. Noe, Feb 28 2011
STATUS
approved