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A194286 Triangular array:  g(n,k)=number of fractional parts (i*sqrt(2)) in interval [(k-1)/n, k/n], for 1<=i<=2n, 1<=k<=n. 2
2, 2, 2, 2, 3, 1, 2, 3, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 3, 2, 1, 3, 2, 1, 3, 1, 3, 1, 3, 2, 2, 2, 2, 2, 2, 2, 3, 1, 2, 2, 2, 1, 3, 2, 3, 1, 2, 2, 3, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 2, 2, 3, 2, 1, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

See A194285.

LINKS

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

EXAMPLE

First eight rows:

2

2..2

2..3..1

2..3..1..2

2..2..2..2..2

2..2..2..2..2..2

2..1..3..2..1..3..2

1..3..1..3..1..3..2..2

MATHEMATICA

r = Sqrt[2];

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, 2 n}]

TableForm[Table[g[n, k], {n, 1, 14}, {k, 1, n}]]

Flatten[%]    (* A194286 *)

CROSSREFS

Cf. A194285.

Sequence in context: A238646 A194330 A280667 * A063473 A096859 A301304

Adjacent sequences:  A194283 A194284 A194285 * A194287 A194288 A194289

KEYWORD

nonn,tabl

AUTHOR

Clark Kimberling, Aug 21 2011

STATUS

approved

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Last modified November 22 10:59 EST 2019. Contains 329389 sequences. (Running on oeis4.)