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 A384918 #10 Jun 18 2025 00:47:03 %S A384918 2,7,11,17,19,25,31,35,37,41,47,53,59,65,67,71,73,77,79,85,91,97,103, %T A384918 109,115,121,127,131,133,137,139,143,145,149,151,155,157,161,167,173, %U A384918 179,185,191,197,203,209,215,221,227,233,239,245,251,257,259,263 %N A384918 If k is in the sequence, so is k*2^m + 3, for all m > 0, a(1) = 2, ordered. %C A384918 Apart from a(1) = 2, all terms are congruent to 1 or 5 mod 6. It is therefore a subset of A007310. %e A384918 Since 7 is in the sequence, so is 7*2^3 + 3 = 59. %Y A384918 Cf. A007310. %K A384918 nonn %O A384918 1,1 %A A384918 _Jules Beauchamp_, Jun 12 2025