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 A153798 #9 Oct 17 2024 12:15:58 %S A153798 0,1,3,5,11,15,17,29,59,87,105,125,519,605,1277,2201,2279,3215,4251, %T A153798 4421,9687,9939,11211,19935,21699,23207,44495,86241,110501,132047, %U A153798 216089,756837,859431,1257785,1398267,2976219,3021375,6972591,13466915,20996009,24036581 %N A153798 a(n) = A000043(n)-2. %C A153798 Base 2 logarithm of A134708(n). %H A153798 Amiram Eldar, <a href="/A153798/b153798.txt">Table of n, a(n) for n = 1..48</a> %t A153798 MersennePrimeExponent[Range[48]] - 2 (* _Amiram Eldar_, Oct 17 2024 *) %Y A153798 Cf. A000043, A014635, A134708. %K A153798 nonn %O A153798 1,3 %A A153798 _Omar E. Pol_, Jan 20 2009 %E A153798 a(40)-a(41) from _Amiram Eldar_, Oct 17 2024