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 A334749 #48 May 24 2021 00:08:25 %S A334749 1,1,1,2,1,3,2,1,1,4,3,1,2,2,1,5,1,6,4,1,3,2,1,7,2,3,2,4,1,8,5,1,1,9, %T A334749 6,1,4,2,1,10,3,3,2,5,1,11,7,1,2,6,3,4,2,7,4,3,1,12,8,1,5,2,1,13,1,14, %U A334749 9,1,6,2,1,15,4,4,2,8,1,16,10,1,3,5,3,6,2,9,5,3 %N A334749 A fractal sequence produced by interleaving the sequence with its own ordinal transform. %C A334749 The odd bisection is the sequence itself. %C A334749 The even bisection is the ordinal transform of the sequence. %C A334749 If a(1) is 1, the other terms follow from the above constraints. %H A334749 Samuel B. Reid, <a href="/A334749/b334749.txt">Table of n, a(n) for n = 1..10000</a> %H A334749 Samuel B. Reid, <a href="/A334749/a334749.py.txt">Python program for A334749</a> %e A334749 The first 5 terms of the sequence: 1, 1, 1, 2, 1, ... %e A334749 The first 5 terms of its ordinal transform: 1, 2, 3, 1, 4, ... %e A334749 If these terms are interleaved, we get: 1, 1, 1, 2, 1, 3, 2, 1, 1, 4, ... %o A334749 (Python) # See Links section. %Y A334749 Cf. A000120, A002487, A003603. %K A334749 nonn %O A334749 1,4 %A A334749 _Samuel B. Reid_, Jun 13 2020