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 A240535 #24 Oct 11 2021 18:52:57 %S A240535 1,1,1,1,3,1,5,1,9,1,3,1,17,5,1,1,33,1,3,9,65,1,7,1,129,17,5,1,13,1, %T A240535 257,33,513,3,9,1,1025,65,11,1,25,1,17,5,2049,1,129,1,4097,257,33,1, %U A240535 49,9,21,513,8193,1,7,1,16385,3,65,17,97,1,129,1025,19,1 %N A240535 a(n)=m if n belongs to the S_m sequence described in A240521. %C A240535 See comments in A240521. %e A240535 Let n = 30. We have a unique representation of 30 as a product of distinct terms of A050376: 30 = 2*3*5. We write all the terms of A050376 in the interval [2,5]: 2,3,4,5. Under the terms used in the representation of 30 we write 1, under other terms we write 0. After concatenation we obtain the binary number corresponding to 30: 1101. In decimal it is 13. So a(30) = 13. %e A240535 Let n = 60 = 3*4*5. In the interval [3,5] the terms of A050376 are 3,4,5, all of which are used in the representation of 60. So we write 1 under all 3 terms and obtain the binary number 111. In decimal it is 7. So a(60)=7. %Y A240535 Positions of particular values: A050376 (1), A240521 (3), A240522 (5), A240524 (7), A240536 (9), A241024 (11), A241025 (13). %K A240535 nonn %O A240535 2,5 %A A240535 _Vladimir Shevelev_, Apr 07 2014 %E A240535 Terms corrected and more terms added, _Peter J. C. Moses_, Apr 18 2014 %E A240535 Name revised and other edits by _Peter Munn_, Oct 11 2021