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 A345043 #7 Jun 07 2021 06:50:39 %S A345043 1,2,6,1,20,0,42,0,10,22,110,-16,156,60,96,-1,272,-15,342,-12,220,184, %T A345043 506,-12,76,270,14,0,812,-492,930,-2,612,490,792,-38,1332,624,880,-10, %U A345043 1640,-660,1806,48,132,940,2162,56,246,63,1560,84,2756,-36,2128,-8,1972,1534,3422,-1248,3660,1764,330,-3,3036,-996,4422 %N A345043 a(n) = A344998(n) - A344999(n). %C A345043 Each term a(n) seems to be a multiple of A033879(n). Factor (quotient) is negative at least for 16, 32, 48, 64, 72, 80, 96, 112, 128, 144, 160, 176, 192, 200, 208, 216, 224, 240, 243, 256, 272, 288, 304, 320, 324, 336, 352, 368, 384, 392, 400, 416, 432, 448, 464, 480, 486, ... %F A345043 a(n) = A344998(n) - A344999(n). %Y A345043 Cf. A033879, A344998, A344999, A345003 (positions of zeros). %K A345043 sign %O A345043 1,2 %A A345043 _Antti Karttunen_, Jun 06 2021