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 A165316 #12 May 12 2024 00:47:20 %S A165316 0,0,2,2,0,2,3,3,2,0,2,4,2,3,4,4,3,2,4,2,0,2,3,5,4,2,4,5,3,4,5,5,4,3, %T A165316 5,4,2,4,5,3,2,0,2,4,2,3,4,6,5,4,6,4,2,4,5,6,5,3,5,6,4,5,6,6,5,4,6,5, %U A165316 3,5,6,5,4,2,4,6,4,5,6,4,3,2,4,2,0,2,3,5,4,2,4,5,3,4,5,7,6,5,7,6,4,6,7,5,4 %N A165316 a(n) = the number of digits in the binary representation of n that each either precede and/or follow a similarly valued digit. %H A165316 John Tyler Rascoe, <a href="/A165316/b165316.txt">Table of n, a(n) for n = 1..8191</a> %e A165316 184 in binary is 10111001. There are exactly five binary digits (the 2nd, 3rd, and 4th 1's from the left, and the 2nd and 3rd 0's from the left) that are each adjacent to a similar digit. So a(184) = 5. %Y A165316 Cf. A165317. %K A165316 base,nonn,easy %O A165316 1,3 %A A165316 _Leroy Quet_, Sep 14 2009 %E A165316 Extended by _Ray Chandler_, Mar 13 2010