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 A284279 #9 Jan 08 2025 13:01:42 %S A284279 276,306,396,564,660,696,780,828,888,966,996,1074,1086,1098 %N A284279 Primitive terms of A131884. %C A284279 In other words, terms of A131884 that cannot be written as k*t where k is an integer, k > 1, t is a term of A131884. %e A284279 Since 276 is the first term of A131884, the number is in the sequence. But 131884(4) = 552 is not, because A131884(4) = 2 * A131884(1) = 2 * 276. %Y A284279 Cf. A131884. %K A284279 nonn,more %O A284279 1,1 %A A284279 _Sergey Pavlov_, Mar 24 2017