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A065863 Remainder when n-th prime is divided by the number of nonprimes not exceeding n. 3

%I #13 Jun 17 2018 02:01:59

%S 0,0,0,1,1,1,2,3,3,5,1,2,6,3,2,3,9,6,1,11,8,9,13,14,1,16,13,12,14,13,

%T 7,5,5,1,5,1,7,7,5,5,11,7,17,13,11,7,19,25,23,19,17,17,19,23,23,23,23,

%U 19,25,23,25,29,37,35,31,29,43,43,47,43,47,47,3,2,1,53,53,55,2,3,6,1,11,6

%N Remainder when n-th prime is divided by the number of nonprimes not exceeding n.

%H Harry J. Smith, <a href="/A065863/b065863.txt">Table of n, a(n) for n = 1..1000</a>

%F a(n) = prime(n) mod (n - pi(n)) = A000040(n) mod A062298(n).

%e n=25, p(25)=97, n - pi(n) = 25 - 9 = 16, a(25)=1 because 97 = 6*16 + 1.

%t Table[Mod[Prime[n],n-PrimePi[n]],{n,90}] (* _Harvey P. Dale_, Aug 04 2015 *)

%o (PARI) { for (n = 1, 1000, a=prime(n)%(n - primepi(n)); write("b065863.txt", n, " ", a) ) } \\ _Harry J. Smith_, Nov 02 2009

%Y Cf. A000040, A062298, A065858-A065864, A065134, A004648, A065133, A065134.

%K nonn

%O 1,7

%A _Labos Elemer_, Nov 26 2001

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