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Filtering sequence (related to prime factorization): a(n) = A046523(A122111(n)).
19

%I #7 Nov 19 2016 08:26:41

%S 1,2,4,2,8,6,16,2,4,12,32,6,64,24,12,2,128,6,256,12,36,48,512,6,8,96,

%T 4,24,1024,30,2048,2,72,192,24,6,4096,384,144,12,8192,60,16384,48,12,

%U 768,32768,6,16,12,288,96,65536,6,72,24,576,1536,131072,30,262144,3072,36,2,216,120,524288,192,1152,60,1048576,6,2097152,6144,12,384,48,240,4194304,12,4

%N Filtering sequence (related to prime factorization): a(n) = A046523(A122111(n)).

%H Antti Karttunen, <a href="/A278221/b278221.txt">Table of n, a(n) for n = 1..2048</a>

%F a(n) = A046523(A122111(n)).

%o (Scheme) (define (A278221 n) (A046523 (A122111 n)))

%Y Cf. A046523, A122111.

%Y Cf. also A278220.

%K nonn

%O 1,2

%A _Antti Karttunen_, Nov 16 2016