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 A075102 #15 Jan 01 2024 11:18:20 %S A075102 0,0,1,0,2,5,5,0,2,4,1,1,13,12,3,0,19,3,4,8,10,11,20,1,7,1,3,8,12,1,2, %T A075102 0,20,6,4,7,8,23,39,1,21,8,13,16,4,1,9,7,1,6,23,30,73,6,3,14,7,7,20, %U A075102 12,228,16,3,0,10,5,96,3,4,13,28,3,72,57,7,9,6,6 %N A075102 Number of steps to reach the first integer starting with 2^n/n and iterating the map x->x*ceiling(x), or -1 if no integer is ever reached. %C A075102 The starting value is A075101(n)/A000265(n). %H A075102 J. C. Lagarias and N. J. A. Sloane, Approximate squaring (<a href="http://neilsloane.com/doc/apsq.pdf">pdf</a>, <a href="http://neilsloane.com/doc/apsq.ps">ps</a>), Experimental Math., 13 (2004), 113-128. %e A075102 a(5)=2 since (2^5)/5 = 32/5 -> 224/5 -> 2016 = A075103(5). %Y A075102 Cf. A000265, A068119, A073524, A075101, A075103. %K A075102 nonn %O A075102 1,5 %A A075102 _Reinhard Zumkeller_, Sep 02 2002 %E A075102 More terms from _Jinyuan Wang_, Jan 15 2022