A175866 Numbers k such that 2^(k-1) == 1 (mod k) and 2^(k-1) == 3*k + 1 (mod k^2).

5, 13, 19, 173, 5501

Offset

1,1

Links

Table of n, a(n) for n=1..5.

Crossrefs

Cf. A124924.

Sequence in context: A160031 A154634 A232655 * A227500 A265814 A087714

Adjacent sequences: A175863 A175864 A175865 * A175867 A175868 A175869

Keyword

nonn,more

Author

Alzhekeyev Ascar M, Sep 30 2010

Status

approved