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 A277331 #16 Oct 29 2016 07:04:22 %S A277331 1,2,4,8,6,16,12,18,32,24,36,54,30,64,48,72,108,60,162,90,150,128,96, %T A277331 144,216,120,324,180,300,486,270,450,750,210,256,192,288,432,240,648, %U A277331 360,600,972,540,900,1500,420,1458,810,1350,2250,630,3750,1050,1470,512,384,576,864,480,1296,720,1200,1944,1080,1800,3000,840 %N A277331 a(n) = A253563(A003714(n)). %C A277331 After the initial terms 1, 2 and 4, all other terms can be inductively generated by applying any finite composition-combination of A253560 and A253550 to 4, but with such a restriction that A253550 may not be applied twice in succession. %C A277331 A permutation of A055932. %H A277331 Antti Karttunen, <a href="/A277331/b277331.txt">Table of n, a(n) for n = 0..10946</a> %F A277331 a(n) = A253563(A003714(n)). %F A277331 a(n) = A122111(A277006(n)). %o A277331 (Scheme) (define (A277331 n) (A253563 (A003714 n))) %Y A277331 Cf. A003714, A055932 (same sequence sorted into ascending order), A253550, A253560, A253563, A122111. %Y A277331 Cf. also A277006, A277332. %K A277331 nonn %O A277331 0,2 %A A277331 _Antti Karttunen_, Oct 12 2016