A333502 a(n) is the n-th number m such that m^2 divides n^m - 1 (or 0 if m does not exist).

1, 0, 4, 903, 12, 776119592182705, 12, 42931441, 136, 27486820443, 60, 107342336783, 84

Offset: 1

Author

Seiichi Manyama, Mar 24 2020

Keywords

• nonn
• more

Crossrefs

Main diagonal of A333500.

Cf. A127106, A127100, A128405, A333433.

Programs

PARI

{a(n) = if(n==2, 0, my(cnt=0, k=0); while(cnt
				

Formula

a(n) = A333500(n,n).