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 A057748 #7 Apr 08 2020 02:18:48 %S A057748 0,1,2,2,2,3,4,3,3,5,4,3,4,3,2,2,3,5,5,2,2,5,4,2,4,7,7,6,5,4,4,3,3,5, %T A057748 6,6,5,5,6,5,4,6,8,5,2,3,4,3,1,3,7,7,4,3,5,5,3,4,7,7,5,4,4,4,5,7,7,5, %U A057748 6,8,6,5,8,9,8,8,6,4,3,1,3,7,6,5,7,9,8,6,6,8,10,8,6,7,7,5,2,2,7,9,6,8,11,6 %N A057748 Number of decompositions of 2n-1 into sum of a twin lucky number and a twin even-lucky-number (from A045955, A045956). %C A057748 Conjecture: this sequence is always positive (with n>1). %H A057748 Jinyuan Wang, <a href="/A057748/b057748.txt">Table of n, a(n) for n = 1..5000</a> %e A057748 1 is not the sum of Twin lucky number and Twin 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 A057748 Cf. A000959, A057701, A045954, A045955, A045956. %K A057748 nonn,easy %O A057748 1,3 %A A057748 _Naohiro Nomoto_, Oct 30 2000 %E A057748 Offset changed to 1 by _Jinyuan Wang_, Apr 07 2020