

A194331


Triangular array: g(n,k)=number of fractional parts (i*r) in interval [(k1)/n, k/n], for 1<=i<=n^2, 1<=k<=n, r=2sqrt(3).


2



1, 2, 2, 3, 4, 2, 4, 5, 3, 4, 5, 5, 5, 5, 5, 7, 5, 6, 7, 6, 5, 7, 7, 7, 7, 7, 7, 7, 8, 8, 9, 7, 9, 7, 8, 8, 10, 9, 8, 10, 9, 9, 9, 9, 8, 10, 9, 11, 10, 9, 11, 10, 10, 10, 10, 11, 11, 11, 12, 11, 11, 12, 10, 11, 11, 10, 13, 11, 12, 13, 11, 12, 13, 12, 11, 13, 12, 11, 13, 13, 13
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OFFSET

1,2


COMMENTS

See A194285.


LINKS

Table of n, a(n) for n=1..81.


EXAMPLE

First eight rows:
1
2..2
3..4..2
4..5..3..4
5..5..5..5..5
7..5..6..7..6..5
7..7..7..7..7..7..7
8..8..9..7..9..7..8..8


MATHEMATICA

r = 2Sqrt[3];
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^2}]
TableForm[Table[g[n, k], {n, 1, 14}, {k, 1, n}]]
Flatten[%] (* A194331 *)


CROSSREFS

Cf. A194285.
Sequence in context: A285705 A238958 A238971 * A290600 A143595 A211702
Adjacent sequences: A194328 A194329 A194330 * A194332 A194333 A194334


KEYWORD

nonn,tabl


AUTHOR

Clark Kimberling, Aug 22 2011


STATUS

approved



