login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A174375 n^2 - XOR(n^2, n). 3
0, 1, -2, -1, -4, -3, 2, -5, -8, -7, -10, 7, -12, 5, -6, -13, -16, -15, -18, -17, 12, 13, -14, 11, -24, 9, -26, 23, 4, -11, -22, -29, -32, -31, -34, -33, -36, -35, 34, 27, -40, -39, 22, 39, -44, 37, -38, 19, -48, 17, -50, 15, -20, 45, 18, -21, -56, 41, 6, -9, -28 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

Plotting the points of a(n) versus n up to a power of 2 approximates a Sierpinski gasket.

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 0..8192

FORMULA

a(n) = n^2 - XOR(n^2, n), where XOR is bitwise.

MATHEMATICA

Table[n^2-BitXor[n^2, n], {n, 0, 60}] (* Harvey P. Dale, Jun 30 2011 *)

PROG

(Haskell)

a174375 n = n ^ 2 - a169810 n  -- Reinhard Zumkeller, Dec 27 2012

(PARI) a(n)=n^2 - bitxor(n^2, n) \\ Charles R Greathouse IV, Sep 27 2016

CROSSREFS

Cf. A169810.

Sequence in context: A205558 A082494 A194187 * A110663 A294317 A064277

Adjacent sequences:  A174372 A174373 A174374 * A174376 A174377 A174378

KEYWORD

sign,nice,look

AUTHOR

Carl R. White, Mar 17 2010

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified July 23 00:51 EDT 2018. Contains 312919 sequences. (Running on oeis4.)