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A175217 The second nonprimes after the primes. 0

%I

%S 6,6,8,9,14,15,20,21,25,32,33,39,44,45,49,55,62,63,69,74,75,81,85,91,

%T 99,104,105,110,111,115,129,133,140,141,152,153,159,165,169,175,182,

%U 183,194,195,200,201,213,225,229,231,235,241,243,253,259,265,271,273,279

%N The second nonprimes after the primes.

%F a(n) = prime(n)+2 + A010051(prime(n)+1) + A010051(prime(n)+2) + A010051(prime(n)+3). [From _Reinhard Zumkeller_, Mar 29 2010]

%K nonn,easy

%O 1,1

%A _Jaroslav Krizek_, Mar 06 2010

%E More terms from _Reinhard Zumkeller_, Mar 29 2010

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Last modified May 23 02:53 EDT 2013. Contains 225585 sequences.