1,2

Complement of A064164, superset of A002981. 109 is the first number whose status is unknown.

Table of n, a(n) for n=1..19.

H. Mishima, Factors of N!+1

46 is in the list because 46!+1 = 47 * 268662306503771535067 * 435777793891607546778854755077304349 and all of those factors are = 1 mod 46.

Cf. A002981, A064164.

Sequence in context: A173919 A205666 A245809 * A001751 A191927 A116000

Adjacent sequences: A064292 A064293 A064294 * A064296 A064297 A064298

nonn,more

Don Reble, Sep 25 2001

a(19) from Amiram Eldar, Oct 03 2019

approved