A188189 [nr]-[kr]-[nr-kr], where r=sqrt(5), k=2, [ ]=floor.

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

Offset

1

Comments

See A188014.

Links

Table of n, a(n) for n=1..123.

Formula

a(n)=[nr]-[2r]-[nr-2r], where r=sqrt(5).

Mathematica

r=5^(1/2)); k=2;
t=Table[Floor[n*r]-Floor[(n-k)*r]-Floor[k*r], {n, 1, 220}]   (*A188189*)
Flatten[Position[t, 0]]  (*A188190*)
Flatten[Position[t, 1]]  (*A188191*)

Crossrefs

Cf. A188014, A188190, A188191.

Sequence in context: A068433 A266895 A088592 * A029692 A309849 A071906

Adjacent sequences: A188186 A188187 A188188 * A188190 A188191 A188192

Keyword

nonn

Author

Clark Kimberling, Mar 23 2011

Status

approved