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 A057747 #9 Apr 08 2020 02:18:35 %S A057747 0,1,2,2,2,3,4,3,3,5,4,4,5,6,4,4,5,7,6,5,5,8,6,6,6,8,8,9,8,8,7,6,7,8, %T A057747 9,9,9,9,10,10,7,10,13,8,9,11,10,8,9,10,12,10,12,9,12,11,10,12,14,12, %U A057747 15,12,10,12,10,13,16,11,13,16,14,11,15,15,13,17,15,12,13,10,12,18,14,11 %N A057747 Number of decompositions of 2n-1 into sum of a lucky number and an even-lucky-number (from A045954). %H A057747 Jinyuan Wang, <a href="/A057747/b057747.txt">Table of n, a(n) for n = 1..1000</a> %e A057747 1 is not the sum of a lucky number and an even-lucky-number, so a(1)=0; 3=1+2 (one way, so a(2)=1); 5=3+2=1+4 (so a(3)=2); etc. %Y A057747 Cf. A000959, A045954. %K A057747 nonn,easy %O A057747 1,3 %A A057747 _Naohiro Nomoto_, Oct 30 2000 %E A057747 Offset changed to 1 by _Jinyuan Wang_, Apr 07 2020