A194337 Triangular array: g(n,k)=number of fractional parts (i*r) in interval [(k-1)/n, k/n], for 1<=i<=n, 1<=k<=n, r=3-sqrt(5).

1, 0, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 2, 2, 0, 1, 0, 2, 1, 1, 2, 0, 2, 0, 2, 0, 2, 0, 2, 0, 1, 1, 1, 1, 1, 1, 1, 2, 0, 1, 1, 1, 1, 0, 2, 1, 1, 2, 0, 1, 1, 0, 2, 1, 1, 1, 1, 1, 2, 0, 1, 1, 1, 1, 2, 0, 1, 2, 0, 2, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 2, 1, 0, 1

Offset

1,3

Comments

See A194285.

Links

Table of n, a(n) for n=1..99.

Example

First nine rows:
1
0..2
1..1..1
1..1..1..1
1..1..1..1..1
1..1..0..2..2..0
1..0..2..1..1..2..0
2..0..2..0..2..0..2..0
1..1..1..1..1..1..1..2..0

Mathematica

r = 3-Sqrt[5];
f[n_, k_, i_] := If[(k - 1)/n <= FractionalPart[i*r] < k/n, 1, 0]
g[n_, k_] := Sum[f[n, k, i], {i, 1, n}]
TableForm[Table[g[n, k], {n, 1, 14}, {k, 1, n}]]
Flatten[%]    (* A194337 *)

Crossrefs

Cf. A194285.

Sequence in context: A300547 A025452 A299202 * A365335 A299912 A369162

Adjacent sequences: A194334 A194335 A194336 * A194338 A194339 A194340

Keyword

nonn,tabl

Author

Clark Kimberling, Aug 22 2011

Status

approved