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 A272006 #28 Sep 01 2016 13:12:56
%S A272006 0,0,0,8,6,2,2,18,6,6,18,2,38,36,30,36,60,2,2,50,38,116,8,116,6,12,66,
%T A272006 102,330,318,56,32,48,60,192,68,66,42,132,2,120,108,62,56,30,8,120,32,
%U A272006 192,8,150,120,326,170,30,20,2,278,158,18,6,92,446,120,56,48,48,48,98,8,32,272,38,78,206
%N A272006 a(n) = A003617(n) - A062397(n-1).
%F A272006 a(n) = A033873(n-1) - 1. - _Michel Marcus_, Jul 28 2016
%e A272006 For n=4, the smallest 4-digit prime is 1009, and 10^(4-1) + 1 = 1001, so a(4) = 1009 - 1001 = 8. - _Michael B. Porter_, Aug 01 2016
%t A272006 Table[NextPrime[#] - (# + 1) &[10^(n - 1)], {n, 75}] (* _Michael De Vlieger_, Jul 13 2016 *)
%o A272006 (PARI) a(n) = nextprime(10^(n-1)) - (10^(n-1) + 1); \\ _Michel Marcus_, Jul 28 2016
%Y A272006 Cf. A003617, A033873, A062397.
%K A272006 base,nonn
%O A272006 1,4
%A A272006 _Carauleanu Marc_, Jul 13 2016