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 A368325 #93 Feb 02 2024 23:57:21 %S A368325 1,2,4,6,8,16,30,32,64,128,210,256,512,1024,2048,2310,4096,8192,16384, %T A368325 30030,32768,65536,131072,262144,510510,524288,1048576,2097152, %U A368325 4194304,8388608,9699690,16777216,33554432,67108864,134217728,223092870,268435456,536870912,1073741824 %N A368325 Union of primorials and powers of 2. %C A368325 Numbers that (1) are either prime powers or squarefree and (2) have a primorial kernel. %H A368325 Michael De Vlieger, <a href="/A368325/b368325.txt">Table of n, a(n) for n = 1..3671</a> %F A368325 Union of A000079 and A002110. %F A368325 Intersection of A055932 and A303554. %F A368325 Intersection of A025487 and A303554. %F A368325 {a(n)} = A055932 \ A126706 = A025487 \ A126706. %F A368325 A055932 = union of this sequence and A363814. %F A368325 A025487 = union of this sequence and A364710. %t A368325 Union@ Flatten@ {#, 2^Range[Log2[Last[#] ] ] } &@ %t A368325 FoldList[Times, 1, Prime@ Range[nn]] %Y A368325 Cf. A000079, A000961, A002110, A005117, A025487, A055932, A126706, A303554, A363814, A364710. %K A368325 nonn,easy %O A368325 1,2 %A A368325 _Michael De Vlieger_, Jan 30 2024