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 A139723 #4 Feb 22 2020 20:57:36 %S A139723 3,1,20,16,2,9,28,18,20,0,1,7,1,14,13,4,0,0,11,18,2,11,14,11,3,15,31, %T A139723 10,0,8,12,6,9,11,2,8,9,4,9,6,1,1,3,24,3,17,3,3,1,38,18,27,15,18,6,7, %U A139723 3,7,7,32,7,2,1,4,11,4,6,23,19,27,2,16,1,4,2,0,12,6,6,2,25,4,2,26,3,8,0,7,1,9 %N A139723 Number of digits between successive occurrences of digit 5 in decimal representation of Pi. %t A139723 Last[#]-First[#]-1&/@Partition[Transpose[Position[RealDigits[Pi,10,1000],5]][[2]],2,1] (* _Harvey P. Dale_, Dec 06 2013 *) %Y A139723 Cf. A135088, A000796. %K A139723 nonn,base %O A139723 1,1 %A A139723 Daniel Drijard (daniel.drijard(AT)cern.ch)