This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A096836 #8 Nov 16 2019 20:09:18
%S A096836 3,3,1,2,3,1,1,2,3,1,3,1,1,3,1,0,7,5,1,3,0,2,2,2,1,0,0,0,2,3,3,2,4,0,
%T A096836 2,1,3,1,5,2,0,2,4,4,2,1,3,3,3,1,0,0,0,1,2,2,1,0,1,4,4,1,2,5,2,1,4,2,
%U A096836 3,3,2,3,3,2,1,1,2,3,1,4,4,0,4,0,2,2,0,2,3,2,6,0,3,4,4,1,1,4,0,0,4,3,3,0,3
%N A096836 Number of primes in the neighborhood of 10^n with radius ceiling(log(10^n)).
%F A096836 a(n) equals almost A096509(10^n) >= a(n) because here only primes are counted, the true prime powers not.
%e A096836 a(5)=3 and the 3 primes in [99988,100012] are {99989,99991,100003}.
%Y A096836 Cf. A096509-A096523, A096830-A096840.
%K A096836 nonn
%O A096836 1,1
%A A096836 _Labos Elemer_, Jul 14 2004