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 A063046 #9 Apr 17 2023 02:09:46 %S A063046 6,5,7,10,6,5,8,5,11,11,7,8,6,11,9,28,5,10,12,6,12,17,8,11,9,6,7,15, %T A063046 12,16,10,12,29,6,5,25,11,9,13,21,7,11,13,12,18 %N A063046 Length of non-periodic head in Collatz-2 (A063041) trajectory starting at n. %e A063046 a(3) = 5 (see A063042), a(17) = 28 (see A063043), a(29) = 15 (see A063044) %Y A063046 Cf. A063041, A063042, A063043, A063044. %K A063046 nonn,more %O A063046 2,1 %A A063046 _Reinhard Zumkeller_, Jul 07 2001 %E A063046 a(14) corrected by _Sean A. Irvine_, Apr 16 2023