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A188075 Positions of 0 in the zero-one sequence [nr]-[4r]-[nr-4r], where r=sqrt(3), n>=1. 1
4, 15, 30, 45, 56, 71, 86, 101, 112, 127, 142, 157, 168, 183, 198, 209, 224, 239, 254, 265, 280, 295, 310, 321, 336, 351, 366, 377, 392, 407, 418, 433, 448, 463, 474, 489, 504, 519, 530, 545, 560, 575, 586, 601, 616, 627, 642, 657, 672, 683, 698, 713, 728, 739, 754, 769, 780, 795, 810, 825, 836, 851, 866, 881, 892, 907, 922, 937, 948, 963, 978, 989 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

See A188014.

LINKS

Table of n, a(n) for n=1..72.

MATHEMATICA

r=3^(1/2)); k=4;

t=Table[Floor[n*r]-Floor[(n-k)*r]-Floor[k*r], {n, 1, 220}]   Flatten[Position[t, 0]]  (*A188075*)

Flatten[Position[t, 1]]  (* complement of A188075 *)

CROSSREFS

Cf. A188014, A188068.

Sequence in context: A030553 A154493 A031012 * A121914 A270710 A110341

Adjacent sequences:  A188072 A188073 A188074 * A188076 A188077 A188078

KEYWORD

nonn

AUTHOR

Clark Kimberling, Mar 20 2011

STATUS

approved

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Last modified February 18 03:43 EST 2018. Contains 299298 sequences. (Running on oeis4.)