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A069042
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Numbers n such that the n-th Euler number (A000364) == 1 (mod n^2).
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1
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OFFSET
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1,1
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LINKS
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Table of n, a(n) for n=1..5.
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MATHEMATICA
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Select[Range[2, 10000], Divisible[Abs[EulerE[2*#]] - 1, #^2] &] (* Amiram Eldar, Jun 03 2017 *)
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CROSSREFS
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Cf. A000364, A081730.
Sequence in context: A307161 A294560 A258977 * A121923 A212276 A000956
Adjacent sequences: A069039 A069040 A069041 * A069043 A069044 A069045
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KEYWORD
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nonn,more
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AUTHOR
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Benoit Cloitre, Apr 06 2003
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EXTENSIONS
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More terms from Hans Havermann, Apr 07 2003
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STATUS
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approved
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