|
|
A088231
|
|
Triangle read by rows: T(n,k) = number of squares not less than n-k and not greater n+k, 0<=k<n.
|
|
0
|
|
|
1, 0, 1, 0, 1, 2, 1, 1, 1, 2, 0, 1, 1, 1, 3, 0, 0, 1, 2, 2, 3, 0, 0, 1, 2, 2, 2, 3, 0, 1, 1, 1, 2, 2, 2, 3, 1, 1, 1, 1, 1, 2, 2, 3, 4, 0, 1, 1, 1, 1, 1, 3, 3, 3, 4, 0, 0, 1, 1, 1, 2, 2, 3, 3, 3, 4, 0, 0, 0, 1, 2, 2, 2, 2, 3, 3, 3, 4, 0, 0, 0, 1, 2, 2, 2, 2, 2, 3, 3, 3, 5, 0, 0, 1, 1, 1, 2, 2, 2, 2, 2, 3
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,6
|
|
COMMENTS
|
|
|
LINKS
|
|
|
MATHEMATICA
|
T[n_, k_] := Select[Range[n-k, n+k], IntegerQ@Sqrt@#&] // Length;
|
|
CROSSREFS
|
|
|
KEYWORD
|
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|