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 A374180 #10 Jul 01 2024 19:18:43 %S A374180 2,10,26,28,34,44,50,56,58,74,76,82,88,92,98,106,112,122,124,130,140, %T A374180 146,152,154,170,172,176,178,184,188,194,202,218,220,224,226,236,242, %U A374180 248,250,266,268,274,280,284,290,298,304,314,316,322,332,338,344,346 %N A374180 Numbers k such that K(3 / k) != K((-1)^floor(k/2)*k / 3), where K(a/b) is the Kronecker symbol. Row 1 of A374188. %o A374180 (SageMath) # see A374188 %o A374180 print(A374188_row(1, 350)) %Y A374180 Cf. A374188, A374181, A374182, A374183, A374184. %Y A374180 Cf. A372728 (Kronecker). %K A374180 nonn %O A374180 1,1 %A A374180 _Peter Luschny_, Jun 30 2024