login
a(n) = A278233(A277699(n)).
5

%I #6 Nov 19 2016 08:30:03

%S 1,4,6,16,12,60,6,64,30,180,6,240,12,60,24,256,240,420,6,720,12,60,30,

%T 960,6,180,60,240,30,360,30,1024,30,5040,30,1680,6,60,360,2880,30,180,

%U 210,240,120,420,6,3840,60,60,96,720,210,1260,6,960,60,420,30,2160,12,420,60,4096,180,420,30,45360,60,420,30,6720,30,60,840,240,30,12600,30,11520,12

%N a(n) = A278233(A277699(n)).

%C Prime factorization sentinel computed for A277699. Factorization is essentially done in the polynomial ring GF(2)[X].

%H Antti Karttunen, <a href="/A278239/b278239.txt">Table of n, a(n) for n = 1..256</a>

%H <a href="/index/Eu#epf">Index entries for sequences computed from exponents in factorization of n</a>

%H <a href="/index/Ge#GF2X">Index entries for sequences operating on polynomials in ring GF(2)[X]</a>

%F a(n) = A278233(A277699(n)).

%o (Scheme) (define (A278239 n) (A278233 (A277699 n)))

%Y Cf. A048720, A065621, A277320, A277699, A278233, A278238.

%K nonn

%O 1,2

%A _Antti Karttunen_, Nov 17 2016