|
%I #12 May 02 2022 11:13:10
%S 0,0,0,1,0,1,0,0,0,1,0,0,0,1,0,1,0,0,0,0,0,1,0,1,0,1,0,0,0,0,0,0,0,1,
%T 0,1,0,1,0,1,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,1,0,1,0,1,0,1,0,1,0,0,0,0,
%U 0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,1,0,1,0,1,0,1,0,0,0,1,0,1,0,0,0,1,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0
%N a(n) = 1 if n is an even number with an even number of prime factors (counted with multiplicity), otherwise 0.
%H Antti Karttunen, <a href="/A353555/b353555.txt">Table of n, a(n) for n = 1..65537</a>
%H <a href="/index/Ch#char_fns">Index entries for characteristic functions</a>
%F a(n) = A059841(n) * A065043(n).
%F a(n) = A059841(n) - A353556(n).
%F a(n) = A065043(n) - A353557(n).
%F a(n) >= A353478(n).
%o (PARI) A353555(n) = ((!(n%2))&&(!(bigomega(n)%2)));
%Y Characteristic function of A063745.
%Y Cf. A059841, A065043, A353478, A353556, A353557, A353558.
%K nonn
%O 1
%A _Antti Karttunen_, May 01 2022
|
