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%I #7 Nov 19 2016 08:26:32
%S 1,2,4,2,8,4,16,2,6,8,32,4,64,16,12,2,128,6,256,8,24,32,512,4,12,64,6,
%T 16,1024,12,2048,2,48,128,36,6,4096,256,96,8,8192,24,16384,32,12,512,
%U 32768,4,24,12,192,64,65536,6,72,16,384,1024,131072,12,262144,2048,24,2,144,48,524288,128,768,36,1048576,6,2097152,4096,30,256,72,96,4194304,8,6,8192
%N Filtering sequence (related to prime factorization): a(n) = A046523(A241909(n)).
%H Antti Karttunen, <a href="/A278220/b278220.txt">Table of n, a(n) for n = 1..410</a>
%F a(n) = A046523(A241909(n)).
%F a(n) = A278219(A075158(n-1)).
%o (Scheme) (define (A278220 n) (A046523 (A241909 n)))
%Y Cf. A046523, A075158, A241909.
%Y Cf. also A278219, A278221.
%K nonn
%O 1,2
%A _Antti Karttunen_, Nov 16 2016
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