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A190671 Positions of 1 in A190669; complement of A190670. 4
1, 4, 5, 8, 9, 12, 13, 15, 16, 19, 20, 23, 24, 27, 30, 31, 34, 35, 38, 39, 42, 45, 46, 49, 50, 53, 54, 56, 57, 60, 61, 64, 65, 68, 69, 71, 72, 75, 76, 79, 80, 83, 86, 87, 90, 91, 94, 95, 98, 101, 102, 105, 106, 109, 110, 112, 113, 116, 117, 120, 121, 124, 125, 127, 128, 131, 132, 135, 136, 139, 142, 143, 146, 147, 150 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

See A190669.

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..10000

MATHEMATICA

r = Sqrt[3]; b = 2; c = 0;

f[n_] := Floor[(b*n + c)*r] - b*Floor[n*r] - Floor[c*r];

t = Table[f[n], {n, 1, 200}] (* A190669 *)

Flatten[Position[t, 0]]      (* A190670 *)

Flatten[Position[t, 1]]      (* A190671 *)

CROSSREFS

Cf. A190669, A190670.

Sequence in context: A288671 A284906 A285260 * A327221 A042948 A126001

Adjacent sequences:  A190668 A190669 A190670 * A190672 A190673 A190674

KEYWORD

nonn

AUTHOR

Clark Kimberling, May 16 2011

STATUS

approved

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Last modified September 21 07:08 EDT 2019. Contains 327253 sequences. (Running on oeis4.)