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 A294896 #9 Nov 27 2017 12:43:05 %S A294896 1,3,4,7,2,2,1,15,1,18,1,2,1,1,2,31,2,1,5,2,1,1,6,2,1,7,10,1,6,8,1,63, %T A294896 16,6,1,7,1,1,2,6,1,3,2,1,2,8,1,2,19,1,2,1,6,8,3,1,10,2,1,4,1,1,8,127, %U A294896 4,2,1,2,3,1,6,1,1,1,2,1,6,8,1,2,1,7,6,1,2,12,1,1,6,2,1,12,1,3,8,2,1,1,2,1,6,8,1,5,2 %N A294896 a(n) = gcd(A000203(n), A005187(n)). %H A294896 Antti Karttunen, <a href="/A294896/b294896.txt">Table of n, a(n) for n = 1..16384</a> %F A294896 a(n) = gcd(A000203(n), A005187(n)). %F A294896 a(n) = gcd(A000203(n),abs(A294898(n))) = gcd(A005187(n),abs(A294898(n))), where A294898(n) = A005187(n) - A000203(n). %F A294896 a(n) = A000203(n)/A295655(n) = A005187(n)/A295656(n). %t A294896 Array[GCD[DivisorSigma[1, #], IntegerExponent[(2 #)!, 2]] &, 105] (* _Michael De Vlieger_, Nov 26 2017 *) %o A294896 (Scheme) (define (A294896 n) (gcd (A000203 n) (A005187 n))) %Y A294896 Cf. A000203, A005187, A294898, A294899, A295655, A295656. %K A294896 nonn %O A294896 1,2 %A A294896 _Antti Karttunen_, Nov 25 2017