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 A076896 #13 May 09 2022 08:36:32 %S A076896 1,1,2,3,3,3,4,5,6,7,7,7,8,8,8,9,10,11,12,12,13,14,15,15,16,16,16,17, %T A076896 17,18,19,19,19,20,20,21,22,22,23,24,25,25,26,27,27,28,28,29,30,31,31, %U A076896 32,33,33,34,34,35,36,36,36,37,37,38,39,39,39,40,41,41,42,43,43,44,44 %N A076896 a(1) = 1, a(n) = n-a(floor(2n/3)). %H A076896 Amiram Eldar, <a href="/A076896/b076896.txt">Table of n, a(n) for n = 1..10000</a> %F A076896 a(n) is asymptotic to (6/10)*n. %t A076896 a[1] = 1; a[n_] := a[n] = n - a[Floor[2*n/3]]; Array[a, 100] (* _Amiram Eldar_, May 09 2022 *) %o A076896 (PARI) a(n)=if(n==0,0,n-a(floor(2*n/3))); \\ _Joerg Arndt_, Apr 27 2013 %Y A076896 Cf. A050292. %K A076896 nonn %O A076896 1,3 %A A076896 _Benoit Cloitre_, Nov 26 2002