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A261997 a(n) = prime(n)! - prime(n!). 3

%I #23 Sep 08 2015 14:59:20

%S 0,3,107,4951,39916141,6227015357,355687428046967,121645100408347963,

%T 25852016738884971417571,8841761993739701954543554805353,

%U 8222838654177922817725562105174617

%N a(n) = prime(n)! - prime(n!).

%C a(n) is prime for n = 2, 3, 4, 5, 7.

%H Charles R Greathouse IV, <a href="/A261997/b261997.txt">Table of n, a(n) for n = 1..21</a>

%F a(n) = A039716(n) - A062439(n).

%F log a(n) ~ n log^2 n. - _Charles R Greathouse IV_, Sep 08 2015

%e For n=2, a(n) = prime(n)! - prime(n!) = prime(2)! - prime(2!) = 3.

%t Array[Prime[#]! - Prime[#!] &, {11}] (* _Michael De Vlieger_, Sep 08 2015 *)

%o (PARI) vector(11, n, prime(n)! - prime(n!))

%Y Cf. A039716, A062439.

%K nonn

%O 1,2

%A _Altug Alkan_, Sep 08 2015

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Last modified April 19 21:09 EDT 2024. Contains 371798 sequences. (Running on oeis4.)