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A007976
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Generalized Euler numbers.
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0
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OFFSET
| 1,2
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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.
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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 computed by GAP to be 1430. - Dmitrii Pasechnik.
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CROSSREFS
| Sequence in context: A138265 A000111 A163747 * A058259 A033543 A124531
Adjacent sequences: A007973 A007974 A007975 * A007977 A007978 A007979
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KEYWORD
| nonn,more
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AUTHOR
| Alexandre Kirillov (kirillov(AT)math.upenn.edu)
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EXTENSIONS
| a(7) corrected by Dmitrii Pasechnik (dima(AT)ntu.edu.sg), Mar 27 2008
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