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A357125
Positive integers n such that 2^(n-3) == -1 (mod n).
3
1, 5, 4553, 46777, 82505, 4290773, 4492205, 4976429, 21537833, 21549349, 51127261, 56786089, 60296573, 80837773, 87761789, 94424465, 138644873, 168865001, 221395541, 255881453, 297460453, 305198249, 360306365, 562654205, 635374253, 673867253, 808333573, 1164757553, 1210317349
OFFSET
1,2
COMMENTS
Also, odd integers n dividing 2^n + 8.
Some large terms: 5603900696716667005, 446661376165868432471569407934747098747181600670953926245, 1533278864164902082788937853692280620552397221686019535813.
LINKS
Max Alekseyev, Table of n, a(n) for n = 1..781 (all terms below 10^15)
CROSSREFS
The odd terms of A245319.
Sequence in context: A159397 A024074 A276238 * A086896 A177503 A072021
KEYWORD
nonn
AUTHOR
Max Alekseyev, Sep 13 2022
STATUS
approved