A236378 Difference between n and the result obtained when n is remultiplied from N to GF(2)[X]: a(n) = n - A234741(n).

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, 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, 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

Offset: 0

Author

Antti Karttunen, Jan 24 2014

Keywords

• nonn

Comments

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.

All terms are divisible by 4.

Links

• Antti Karttunen, Table of n, a(n) for n = 0..8191

Crossrefs

Cf. A235034 (gives the positions of zeros).

Cf. A234741, A236379, A236380, A061858.