A048728 Differences between A008585 (multiples of 3) and A048724.

0, 0, 0, 4, 0, 0, 8, 12, 0, 0, 0, 4, 16, 16, 24, 28, 0, 0, 0, 4, 0, 0, 8, 12, 32, 32, 32, 36, 48, 48, 56, 60, 0, 0, 0, 4, 0, 0, 8, 12, 0, 0, 0, 4, 16, 16, 24, 28, 64, 64, 64, 68, 64, 64, 72, 76, 96, 96, 96, 100, 112, 112, 120

Offset: 0

Author

Antti Karttunen, Apr 26 1999

Keywords

• nonn
• easy

Links

• Reinhard Zumkeller, Table of n, a(n) for n = 0..10000

Crossrefs

Positions of zeros are given by A003714. Cf. A048735, A242400.

Diagonal 3 of A061858.

Programs

Haskell

a048728 n = a008585 n - a048724 n  -- Reinhard Zumkeller, May 13 2014

PARI

a(n)=3*n - bitxor(2*n, n) \\ Charles R Greathouse IV, Oct 03 2016

Python

def a(n): return 3*n - (2*n^n) # Indranil Ghosh, Jun 13 2017

Formula

a(n) = n*3 - Xmult(n, 3).