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 A354040 #9 May 19 2022 16:42:20 %S A354040 0,1,5,17,73,245,1037,4624,11829,30940,116701,374756,1205149,2643792, %T A354040 7516934,27309591,102243621 %N A354040 a(n) is the least k such that A353709(k) has Hamming weight n. %C A354040 This sequence is strictly increasing. %H A354040 Rémy Sigrist, <a href="/A354040/a354040.txt">C++ program</a> %e A354040 For n = 3: %e A354040 - the first terms of A353709, alongside their Hamming weight, are: %e A354040 k | 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17 %e A354040 A353709(k) | 0, 1, 2, 4, 8, 3, 16, 12, 32, 17, 6, 40, 64, 5, 10, 48, 65, 14 %e A354040 h(A353709(k)) | 0, 1, 1, 1, 1, 2, 1, 2, 1, 2, 2, 2, 1, 2, 2, 2, 2, 3 %e A354040 - the first term of A353709 with Hamming weight 3 is A353709(17) = 14, %e A354040 - so a(3) = 17. %o A354040 (C++) See Links section. %Y A354040 Cf. A000120, A353709, A354041. %K A354040 nonn,base,more %O A354040 0,3 %A A354040 _Rémy Sigrist_, May 15 2022