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 A126044 #23 Oct 15 2024 03:23:01 %S A126044 2,3,1,3,1,1,3,3,1,1,3,3,1,3,3,3,1,1,1,3,1,1,1,1,1,1,1,3,3,4,3,3,1,3, %T A126044 1,1,1,1,1,3,3,3,1,1,3,1,1,1 %N A126044 Exponents p of the Mersenne primes 2^p - 1 (see A000043) read mod 4. %F A126044 a(n) = A010873(A000043(n)). - _Michel Marcus_, Apr 07 2018 %t A126044 Array[Mod[MersennePrimeExponent@ #, 4] &, 45] (* _Michael De Vlieger_, Apr 07 2018 *) %Y A126044 Cf. A000043, A010873, A126043-A126059. %K A126044 nonn,more %O A126044 1,1 %A A126044 _Artur Jasinski_, Dec 17 2006 %E A126044 a(45)-a(46) from _Ivan Panchenko_, Apr 07 2018 %E A126044 a(47) from _Ivan Panchenko_, Apr 09 2018 %E A126044 a(48) from _Amiram Eldar_, Oct 14 2024