A132387 a(n) = n with each digit d of n replaced by d mod 4.

0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 10, 11, 12, 13, 10, 11, 12, 13, 10, 11, 20, 21, 22, 23, 20, 21, 22, 23, 20, 21, 30, 31, 32, 33, 30, 31, 32, 33, 30, 31, 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 10, 11, 12, 13, 10, 11, 12, 13, 10, 11, 20, 21, 22, 23, 20, 21, 22, 23, 20, 21, 30, 31, 32, 33, 30, 31, 32

Offset

0,3

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..5000

Example

a(n) == n (mod 4) for n=0..9; a(n)=n for n=10..13; a(14)=10, a(15)=11,
a(41)=a(81)=1, etc.

Mathematica

Table[FromDigits[Mod[IntegerDigits[n], 4]], {n, 0, 80}] (* Harvey P. Dale, Aug 25 2014 *)

Crossrefs

Sequence in context: A010873 A049804 A277904 * A309954 A124757 A242305

Adjacent sequences: A132384 A132385 A132386 * A132388 A132389 A132390

Keyword

base,nonn

Author

Zak Seidov, Nov 20 2007

Status

approved