login
A273184
The H_4-Eulerian numbers.
0
1, 2636, 9126, 2636, 1
OFFSET
0,2
COMMENTS
a(n) is the number of elements of the Weyl group H_4 that have a descent set of size n.
Sum_{n=0..4} a(n) = 14400, which is the order of the group H_4.
REFERENCES
T. K. Petersen, Eulerian Numbers, Birkhauser, 2015, Table 11.5.
KEYWORD
nonn,fini,full
AUTHOR
Tom Edgar, May 17 2016
STATUS
approved