|
|
A182728
|
|
Array T(n,k) = n*k*A000041(n) read by antidiagonals, n,k >= 1.
|
|
4
|
|
|
1, 4, 2, 9, 8, 3, 20, 18, 12, 4, 35, 40, 27, 16, 5, 66, 70, 60, 36, 20, 6, 105, 132, 105, 80, 45, 24, 7, 176, 210, 198, 140, 100, 54, 28, 8, 270, 352, 315, 264, 175, 120, 63, 32, 9, 420, 540, 528, 420, 330, 210, 140, 72, 36, 10, 616, 840, 810, 704, 525, 396, 245, 160, 81, 40, 11
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
LINKS
|
|
|
EXAMPLE
|
Array begins:
1, 2, 3, 4, 5, 6, 7, ...
4, 8, 12, 16, 20, 24, 28, ...
9, 18, 27, 36, 45, 54, 63, ...
20, 40, 60, 80, 100, 120, 140, ...
35, 70, 105, 140, 175, 210, 245, ...
66, 132, 198, 264, 330, 396, 462, ...
105, 210, 315, 420, 525, 630, 735, ...
|
|
MAPLE
|
A182728 := proc(n, k) n*k*combinat[numbpart](n) ; end proc:
|
|
CROSSREFS
|
|
|
KEYWORD
|
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|