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A007976 Generalized Euler numbers. +0
1
1, 2, 5, 16, 61, 275, 1430, 8506, 57205 (list; graph; listen)
OFFSET

1,2

REFERENCES

A. A. Kirillov, On the combinatorics of coadjoint orbits, Funct. Anal. Applic., vol. 27 1992 pages 62-64.

A. A. Kirillov, Variations on the triangular theme, Amer. Math. Soc. Transl., (2), Vol. 169, 1995, pp. 43-73, see p. 52.

EXAMPLE

a(7) is the number of conjugacy classes in a Borel subgroup of GL(7,2), also the number of complex irreducible representations, and is easily comp[uted by GAP to be 1430. - Dmitrii Pasechnik.

CROSSREFS

Sequence in context: A104858 A138265 A000111 this_sequence A058259 A033543 A124531

Adjacent sequences: A007973 A007974 A007975 this_sequence A007977 A007978 A007979

KEYWORD

nonn,more

AUTHOR

Alexandre Kirillov (kirillov(AT)math.upenn.edu)

EXTENSIONS

a(7) corrected by Dmitrii Pasechnik (dima(AT)ntu.edu.sg), Mar 27 2008

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.


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