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A278111
Triangle T(n,k) = floor(2n^2/k) for 1 <= k <= 2n^2, read by rows.
2
2, 1, 8, 4, 2, 2, 1, 1, 1, 1, 18, 9, 6, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 32, 16, 10, 8, 6, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 50, 25, 16, 12, 10, 8, 7, 6, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
OFFSET
1,1
FORMULA
T(n,k) = A010766(2n^2,k).
EXAMPLE
The first five rows are:
2, 1;
8, 4, 2, 2, 1, 1, 1, 1;
18, 9, 6, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1;
32, 16, 10, 8, 6, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1;
50, 25, 16, 12, 10, 8, 7, 6, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1;
PROG
(Magma)
A278111:=func<n, k|(2*n^2)div k>;
[A278111(n, k):k in[1..2*n^2], n in[1..5]];
CROSSREFS
Cf. A277646.
Sequence in context: A341724 A089460 A308695 * A223550 A178102 A245836
KEYWORD
nonn,tabf,easy
AUTHOR
Jason Kimberley, Feb 08 2017
STATUS
approved