A236378 - OEIS

%I #11 Mar 01 2014 14:14:56

%S 0,0,0,0,0,0,0,0,0,4,0,0,0,0,0,0,0,0,8,0,0,12,0,0,0,8,0,12,0,0,0,0,0,

%T 4,0,8,16,0,0,16,0,0,24,0,0,28,0,0,0,28,16,0,0,0,24,16,0,4,0,0,0,0,0,

%U 36,0,8,8,0,0,12,16,0,32,0,0,24,0,28,32,0,0,64,0,0,48,0,0,48,0,0,56,56,0,60

%N Difference between n and the result obtained when n is remultiplied from N to GF(2)[X]: a(n) = n - A234741(n).

%C a(n) is the difference of n and the number obtained when the prime divisors of n are multiplied together in such a way that the carry-bits from intermediate products are discarded, as in A048720.

%C All terms are divisible by 4.

%H Antti Karttunen, <a href="/A236378/b236378.txt">Table of n, a(n) for n = 0..8191</a>

%Y Cf. A235034 (gives the positions of zeros).

%Y Cf. A234741, A236379, A236380, A061858.

%K nonn

%O 0,10

%A _Antti Karttunen_, Jan 24 2014