%I #8 Jul 08 2017 12:17:03

%S 1,0,1,2,1,2,1,2,2,3,2,1,3,4,3,2,2,4,4,3,5,4,5,4,6,4,5,4,4,6,6,6,6,7,

%T 6,7,7,6,6,7,5,5,6,7,7,7,8,9,9,8,8,8,9,9,9,9,9,11,11,11,11,10,11,11,

%U 10,10,8,9,9,9,9,9,9,10,10,12,13,14,14,13

%N Number of primes in the interval [7n, 8n].

%H FUNG Cheok Yin, <a href="/A289498/b289498.txt">Table of n, a(n) for n = 1..10000</a>

%Y Cf. A035250, A289493, A289494, A289495, A289496, A289497, A289499, A289500.

%K nonn,easy

%O 1,4

%A _FUNG Cheok Yin_, Jul 07 2017