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 A234750 #17 Apr 29 2021 04:10:27 %S A234750 3,2,7,13,11,19,31,25,55,61,59,37,47,41,87,91,67,73,103,97,109,117, %T A234750 115,253,241,247,239,229,203,193,211,213,171,167,185,191,157,145,137, %U A234750 143,131,285,283,319,313,301,299,351,333,357,355,361,375,369,379,505,499,501 %N A234750 Blue-code restricted to irreducible polynomials over GF(2): a(n) = A193231(A014580(n)). %C A234750 The polynomials are encoded as the number whose binary representation is given by the coefficients of the polynomial, e.g., 13 = 2^3 + 2^2 + 2^0 = 1101_2 encodes 1*X^3 + 1*X^2 + 0*X^1 + 1*X^0 = X^3 + X^2 + 1. - _Peter Munn_, Apr 28 2021 %H A234750 Antti Karttunen, <a href="/A234750/b234750.txt">Table of n, a(n) for n = 1..2538</a> %H A234750 <a href="/index/Ge#GF2X">Index entries for sequences operating on (or containing) GF(2)[X]-polynomials</a> %F A234750 a(n) = A193231(A014580(n)). %e A234750 From _Peter Munn_, Apr 23 2021: (Start) %e A234750 Table for polynomials of degree less than 6: %e A234750 n A014580 a(n) Previous 2 columns %e A234750 (n) in binary %e A234750 1 2 3 10 11 %e A234750 2 3 2 11 10 %e A234750 3 7 7 111 111 %e A234750 4 11 13 1011 1101 %e A234750 5 13 11 1101 1011 %e A234750 6 19 19 10011 10011 %e A234750 7 25 31 11001 11111 %e A234750 8 31 25 11111 11001 %e A234750 9 37 55 100101 110111 %e A234750 10 41 61 101001 111101 %e A234750 11 47 59 101111 111011 %e A234750 12 55 37 110111 100101 %e A234750 13 59 47 111011 101111 %e A234750 14 61 41 111101 101001 %e A234750 (End) %o A234750 (Scheme) (define (A234750 n) (A193231 (A014580 n))) %Y A234750 Cf. A234751, A193231, A014580. %K A234750 nonn,base %O A234750 1,1 %A A234750 _Antti Karttunen_, Feb 12 2014