|
|
A054255
|
|
Triangle T(n,k) (n >= 1, 0<=k<=n) giving number of preferential arrangements of n things beginning with k (transposed, then read by rows).
|
|
1
|
|
|
1, 1, 2, 2, 5, 6, 6, 18, 25, 26, 24, 84, 134, 149, 150, 120, 480, 870, 1050, 1081, 1082, 720, 3240, 6600, 8700, 9302, 9365, 9366, 5040, 25200, 57120, 82320, 92526, 94458, 94585, 94586, 40320, 221760, 554400, 871920, 1038744, 1085364, 1091414
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,3
|
|
COMMENTS
|
Can be generated from Stirling_2 triangle A008277 (cf. A028246, which is intermediate between the two arrays).
|
|
LINKS
|
|
|
EXAMPLE
|
1;
1, 2;
2, 5, 6;
6, 18, 25, 26; ...
|
|
CROSSREFS
|
|
|
KEYWORD
|
|
|
AUTHOR
|
Eugene McDonnell (Eemcd(AT)aol.com), May 05 2000
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|