|
|
A291903
|
|
Sums of the fourth powers of the descent set statistics for permutations on n elements.
|
|
4
|
|
|
1, 1, 2, 34, 1576, 190216, 46479536, 21246061600, 16505196258944, 20569621110703360, 39048520577674054912, 108556407221350072075840, 427386074980323385950161920, 2317659324414032887611600999424, 16904848426143946143993568391307264, 162490636486997482412425606460112242944, 2021898321663894965658036079204603050491904
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,3
|
|
LINKS
|
|
|
FORMULA
|
|
|
EXAMPLE
|
For n=4, we have a(4) = 1^4 + 3^4 + 5^4 + 3^4 + 3^4 + 5^4 + 3^4 + 1^4 = 1576.
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|