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 A175636 Maximal (nonzeros) run length of semiprimes of the form k+4, k+8, k+12,.., where k is a non-semiprime. 0

%I #4 Aug 10 2015 00:36:10

%S 1,3,1,1,2,2,1,2,2,1,1,2,1,2,2,1,1,2,3,1,1,1,4,2,1,1,1,1,2,2,1,2,1,1,

%T 1,1,1,1,2,1,1,6,2,1,2,2,1,1,1,1,2,1,1,1,1,1,2,5,1,2,3,1,3,1,1,1,1,2,

%U 1,1,1,2,2,1,2,2,2,1,2,4,2,1,1,1,1,1,2,1,2,1,2,1,2,7,1,3,1,1,1,1,3,1,2,1,1

%N Maximal (nonzeros) run length of semiprimes of the form k+4, k+8, k+12,.., where k is a non-semiprime.

%e a(1)=1 because k=0=non-semiprime and 0+4=4=semiprime; a(2)=3 because k=2=non-semiprime and 2+4=6=semiprime, 2+8=10=semiprime, 2+12=14=semiprime; a(3)=1 because k=5=non-semiprime and 5+4=9=semiprime.

%Y Cf. A175612, A175632.

%K nonn

%O 1,2

%A Vladislav-Stepan Malakovsky & _Juri-Stepan Gerasimov_, Aug 01 2010

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Last modified December 5 00:23 EST 2023. Contains 367565 sequences. (Running on oeis4.)