A190676 [(bn+c)r]-b[nr]-[cr], where (r,b,c)=(sqrt(3),3,0) and [ ]=floor.

2, 1, 0, 2, 1, 1, 0, 2, 1, 0, 0, 2, 1, 0, 2, 2, 1, 0, 2, 1, 1, 0, 2, 1, 0, 0, 2, 1, 0, 2, 2, 1, 0, 2, 1, 1, 0, 2, 1, 0, 0, 2, 1, 0, 2, 2, 1, 0, 2, 1, 1, 0, 2, 1, 0, 2, 2, 1, 0, 2, 1, 1, 0, 2, 1, 0, 0, 2, 1, 0, 2, 2, 1, 0, 2, 1, 1, 0, 2, 1, 0, 0, 2, 1, 0, 2, 2, 1, 0, 2, 1, 1, 0, 2, 1, 0, 0, 2, 1, 0, 2, 2, 1, 0, 2, 1, 0, 0, 2, 1, 0, 2, 2, 1, 0, 2, 1, 1, 0, 2, 1, 0, 0, 2, 1, 0, 2, 2, 1, 0, 2, 1

Offset

1,1

Comments

Write a(n)=[(bn+c)r]-b[nr]-[cr]. If r>0 and b and c are integers satisfying b>=2 and 0<=c<=b-1, then 0<=a(n)<=b. The positions of 0 in the sequence a are of interest, as are the position sequences for 1,2,...,b. These b+1 position sequences comprise a partition of the positive integers.

Examples:

(golden ratio,2,1): A190427-A190430

(sqrt(2),2,0): A190480-A190482

(sqrt(2),2,1): A190483-A190486

(sqrt(2),3,0): A190487-A190490

(sqrt(2),3,1): A190491-A190495

(sqrt(2),3,2): A190496-A190500

(sqrt(2),4,c): A190544-A190566

Links

Table of n, a(n) for n=1..132.

Formula

a(n)=[3n*sqrt(3)]-3[n*sqrt(3)].

Mathematica

r = Sqrt[3]; b = 3; c = 0;
f[n_] := Floor[(b*n + c)*r] - b*Floor[n*r] - Floor[c*r];
t = Table[f[n], {n, 1, 200}] (* A190676 *)
Flatten[Position[t, 0]]      (* A190677 *)
Flatten[Position[t, 1]]      (* A190678 *)
Flatten[Position[t, 2]]      (* A190679 *)
Table[Floor[3n Sqrt[3]]-3Floor[n Sqrt[3]], {n, 140}] (* Harvey P. Dale, Mar 24 2013 *)

Crossrefs

Cf. A190677, A190678, A190679, A022838.

Sequence in context: A130182 A024361 A305614 * A329308 A135486 A030187

Adjacent sequences: A190673 A190674 A190675 * A190677 A190678 A190679

Keyword

nonn

Author

Clark Kimberling, May 16 2011

Extensions

Definition (Name) corrected by Harvey P. Dale, Mar 24 2013

Status

approved