A096991 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A096991

Initial values for f(x)=sigma(phi[x])=A062402[x] such that iteration of f ends in cycle of length=4.

%I #3 Oct 15 2013 22:32:33

%S 401,451,489,491,505,513,567,577,629,631,652,661,673,679,685,691,713,

%T 731,737,751,757,769,773,791,802,808,811,817,825,829,833,847,851,853,

%U 859,867,869,871,873,877,889,893,899,901,902,907,911,917,919,923,931

%N Initial values for f(x)=sigma(phi[x])=A062402[x] such that iteration of f ends in cycle of length=4.

%Y Cf. A062402, A096926.

%K nonn

%O 1,1

%A _Labos Elemer_, Jul 19 2004