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A188257 [nr+kr]-[nr]-[kr], where r=sqrt(5), k=2, [ ]=floor. 4
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified April 19 20:37 EDT 2021. Contains 343117 sequences. (Running on oeis4.)