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 A093393 #13 Dec 01 2024 14:48:01 %S A093393 0,0,0,1,2,2,2,4,6,7,7,8,9,9,9,10,12,13,14,15,16,16,16,17,18,19,20,22, %T A093393 23,23,23,24,25,25,26,28,30,30,30,31,32,32,32,34,36,37,37,38,39,39,39, %U A093393 40,42,43,44,45,46,46,46,47,48,49,50,52,53,53,53,54,55,55,56,58,60,60 %N A093393 [n/9] + [n/4] + [(n+1)/9] + [(n+1)/4] + [(n+2)/9]. %C A093393 a(n) = A004524(n) + A093390(n). %H A093393 Harvey P. Dale, <a href="/A093393/b093393.txt">Table of n, a(n) for n = 0..1000</a> %H A093393 <a href="/index/Rec#order_10">Index entries for linear recurrences with constant coefficients</a>, signature (2,-2,1,1,-2,1,1,-2,2,-1). %F A093393 G.f.:(x^3*(2*x^6+x^4+x^3+1))/((x^2+1)*(x^6+x^3+1)*(x-1)^2) [From Maksym Voznyy (voznyy(AT)mail.ru), Jul 27 2009] %t A093393 Table[Total[Floor[(n+{0,1,2})/9]]+Total[Floor[(n+{0,1})/4]],{n,0,80}] (* or *) LinearRecurrence[{2,-2,1,1,-2,1,1,-2,2,-1},{0,0,0,1,2,2,2,4,6,7},80] (* _Harvey P. Dale_, Dec 01 2024 *) %K A093393 nonn %O A093393 0,5 %A A093393 _Reinhard Zumkeller_, Mar 28 2004