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A057936 Number of prime factors of 8^n + 1 (counted with multiplicity). 1

%I

%S 2,2,4,2,4,4,4,3,6,6,5,4,4,6,7,3,6,6,5,4,7,6,5,5,7,10,10,5,5,11,5,3,9,

%T 9,11,6,7,8,7,6,7,10,6,7,12,8,7,7,7,14,11,5,6,10,12,8,9,8,8,8,4,9,13,

%U 4,11,12,8,9,8,15,8,8,6,10,12,8,12,17,6,7,15,10,9,12,12,10,11,8,8,18,12

%N Number of prime factors of 8^n + 1 (counted with multiplicity).

%H S. S. Wagstaff, Jr., <a href="http://www.cerias.purdue.edu/homes/ssw/cun/">Main Tables</a> from the Cunningham Project.

%H S. S. Wagstaff, Jr., <a href="http://www.cerias.purdue.edu/homes/ssw/cun/index.html">The Cunningham Project</a>

%F a(n) = A057953(2n) - A057953(n) - _T. D. Noe_, Jun 19 2003

%t PrimeOmega[8^Range[100]+1] (* _Harvey P. Dale_, Dec 16 2014 *)

%Y Cf. A057934-A057941, A054992.

%Y Cf. A057953.

%K nonn

%O 1,1

%A _Patrick De Geest_, Oct 15 2000.

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Last modified October 23 20:17 EDT 2019. Contains 328373 sequences. (Running on oeis4.)