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 A144623 #8 Aug 14 2013 17:07:17 %S A144623 0,0,2,1,3,3,4,2,4,4,4,5,6,6,6,3,5,5,5,6,6,5,7,7,8,8,8,8,9,9,8,4,6,6, %T A144623 6,7,6,7,8,8,8,8,6,8,10,9,10,9,10,10,10,10,11,10,10,11,12,12,12,12,12, %U A144623 12,10,5,7,7,7,8,7,8,9,9,8,7,9,10,10,11,11,10,10,10,10,11,9,7,11,11,13,13 %N A144623 a(n) = A078822(n) - 1. %C A144623 Number of distinct binary numbers contained as proper substrings in the binary representation of n. %H A144623 Reinhard Zumkeller, <a href="/A144623/b144623.txt">Table of n, a(n) for n = 0..10000</a> %o A144623 (Haskell) %o A144623 a144623 = (subtract 1) . a078822 -- _Reinhard Zumkeller_, Aug 14 2013 %K A144623 nonn %O A144623 0,3 %A A144623 _N. J. A. Sloane_, Jan 18 2009 %E A144623 Extended by _Ray Chandler_, Mar 13 2010