A188257 [nr+kr]-[nr]-[kr], where r=sqrt(5), k=2, [ ]=floor.

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

Offset

1

Comments

See A187950.

Links

Table of n, a(n) for n=1..135.

Formula

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

Mathematica

r=5^(1/2); k=2;
seqA=Table[Floor[n*r+k*r]-Floor[n*r]-Floor[k*r], {n, 1, 220}]   (* A188257 *)
Flatten[Position[seqA, 0] ]   (* A188258 *)
Flatten[Position[seqA, 1] ]   (* A188259 *)

Crossrefs

Cf. A187950, A188258, A188259.

Sequence in context: A286063 A339824 A278587 * A132380 A021913 A285501

Adjacent sequences: A188254 A188255 A188256 * A188258 A188259 A188260

Keyword

nonn

Author

Clark Kimberling, Mar 25 2011

Status

approved