A188192 a(n) = [n*r]-[k*r]-[n*r-k*r], where r=sqrt(5), k=3, [ ]=floor.

1, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1

Offset

1

Comments

See A188014.

Links

Table of n, a(n) for n=1..134.

Formula

a(n) = [n*r]-[3*r]-[n*r-3*r], where r=sqrt(5).

Mathematica

r=5^(1/2); k=3;
t=Table[Floor[n*r]-Floor[(n-k)*r]-Floor[k*r], {n, 1, 220}]   (* A188192 *)
Flatten[Position[t, 0]]  (* A188217 *)
Flatten[Position[t, 1]]  (* A188218 *)

Crossrefs

Cf. A188014, A188217, A188218.

Sequence in context: A281114 A286749 A359374 * A068432 A134668 A309970

Adjacent sequences: A188189 A188190 A188191 * A188193 A188194 A188195

Keyword

nonn

Author

Clark Kimberling, Mar 23 2011

Status

approved