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A273184 The H_4-Eulerian numbers. 0
1, 2636, 9126, 2636, 1 (list; graph; refs; listen; history; text; internal format)
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.

LINKS

Table of n, a(n) for n=0..4.

CROSSREFS

Cf. A008292, A060187, A066094, A273000, A273035, A273036, A273181, A273183.

Sequence in context: A254722 A236502 A212605 * A252579 A253040 A157609

Adjacent sequences:  A273181 A273182 A273183 * A273185 A273186 A273187

KEYWORD

nonn,fini,full

AUTHOR

Tom Edgar, May 17 2016

STATUS

approved

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Last modified February 22 15:52 EST 2019. Contains 320399 sequences. (Running on oeis4.)