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

0,4

Links

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

Formula

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

Prog

(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

Crossrefs

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

Diagonal 3 of A061858.

Sequence in context: A055028 A330316 A028591 * A002915 A127733 A330379

Adjacent sequences: A048725 A048726 A048727 * A048729 A048730 A048731

Keyword

nonn,easy

Author

Antti Karttunen, Apr 26 1999

Status

approved