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 A086916 #5 Oct 12 2013 15:14:04 %S A086916 1,1,2,2,2,2,3,3,3,4,4,4,5,5,6,6,6,6,6,6,7,7,9,9,10,10,10,10,10,10,12, %T A086916 13,14,15,18,20,21,23,23,23,25,28,28,29,29,32,33,35,37,38,39,41,43,45, %U A086916 47,50,55,57,62,62,66,73,79,92,101,106,108,115,121,123,126,131,140,141 %N A086916 Number of digits in terms of A087732. %C A086916 Number of digits of the twin primes of the form j*P(i)# - 1 and j*P(i)# + 1 with 0 < j < P(i+1), P(i)= i rank primes, P(i)# = primorial of P(i) (A002110). %e A086916 a(23)=9 since A087732(23)=106696589 has 9 digits. %e A086916 a(31)=12 since A087732(31)=103515091679 has 12 digits. %Y A086916 Cf. A086916, A087651, A087730, A087731, A087732, A088676. %K A086916 nonn,base %O A086916 1,3 %A A086916 _Pierre CAMI_, Sep 25 2003 %E A086916 Edited by _Ray Chandler_, Oct 05 2003