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 A379071 #10 Jan 21 2025 09:54:05 %S A379071 0,1,1,1,-1,1,1,2,0,-1,1,2,2,2,0,-1,-3,1,1,2,2,3,-2,-1,-1,0,0,1,1,2,2, %T A379071 3,2,-2,-2,-1,-1,1,1,2,2,3,3,4,-1,-2,-4,0,-2,2,2,3,-2,-1,-1,0,0,1,1,2, %U A379071 2,2,0,-1,-3,1,1,2,2,3,3,4,4,5,3,-1,-3,-4,-6,-2,-2,-1,1,2,2,3,3,4,4,5,5,5,-5,-4,-4,-3,-3,-2,-2,-1,-1,1,1,2,2,3,3,4,4,5,5,6 %N A379071 a(n) = |A377091[n]| - floor(n/2). %H A379071 N. J. A. Sloane, <a href="/A379071/b379071.txt">Table of n, a(n) for n = 0..20000</a> %t A379071 (* A377091list is defined at A377091 *) %t A379071 Abs[#] - BitShiftRight[Range[0, Length[#] - 1]] & [A377091list[100]] (* _Paolo Xausa_, Jan 21 2025 *) %Y A379071 Cf. A377091, A379070. %K A379071 sign %O A379071 0,8 %A A379071 _N. J. A. Sloane_, Dec 29 2024