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1,2
R. J. Mathar, Table of n, a(n) for n = 1..1000
Eric Weisstein's World of Mathematics, Multiplicative Order
A001651 := proc(n)
(3*(2*n-1)-(-1)^n)/4 ;
end proc:
A050975 := proc(n)
local gcd3 ;
gcd3 := A001651(n+1);
numtheory[order](3, gcd3) ;
end proc: # R. J. Mathar, Oct 21 2012
Cf. A002326, A002329.
Sequence in context: A056649 A075242 A161489 * A053446 A133903 A278263
Adjacent sequences: A050972 A050973 A050974 * A050976 A050977 A050978
nonn
Eric W. Weisstein
approved