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 A289617 #12 Jul 23 2017 16:06:49 %S A289617 0,1,1,3,1,3,1,4,3,3,1,4,1,3,3,7,1,4,1,4,3,3,1,7,3,3,4,4,1,4,1,8,3,3, %T A289617 3,7,1,3,3,7,1,4,1,4,4,3,1,8,3,4,3,4,1,7,3,7,3,3,1,7,1,3,4,10,3,4,1,4, %U A289617 3,4,1,8,1,3,4,4,3,4,1,8,7,3,1,7,3,3,3,7,1,7,3,4,3,3,3,10,1,4,4,7,1,4,1,7,4,3,1,8,1,4,3,8,1,4,3,4,4,3,3,8 %N A289617 a(n) = A005187(A001222(n)). %H A289617 Antti Karttunen, <a href="/A289617/b289617.txt">Table of n, a(n) for n = 1..10000</a> %H A289617 <a href="/index/Eu#epf">Index entries for sequences computed from exponents in factorization of n</a> %F A289617 a(n) = A005187(A001222(n)). %o A289617 (Scheme) (define (A289617 n) (A005187 (A001222 n))) %o A289617 (PARI) a(n) = my(bn=bigomega(n)); 2*bn-hammingweight(bn); \\ _Michel Marcus_, Jul 10 2017 %Y A289617 Cf. A001222, A005187, A289618. %Y A289617 Cf. A268375 (positions where coincides with A046645). %K A289617 nonn %O A289617 1,4 %A A289617 _Antti Karttunen_, Jul 08 2017