

A098787


Stable Poincaré series [or Poincare series] for Lie algebra of type A (i.e., the variety of complex k X k matrices with distinct eigenvalues).


5



1, 1, 0, 1, 2, 4, 6, 9, 17, 30, 47, 75, 131, 221, 358, 589, 987, 1640, 2695, 4435, 7346, 12153, 19993, 32886, 54232, 89349, 146880, 241416, 396995, 652509, 1071496, 1758884, 2887206, 4737820, 7770521, 12740561, 20886071, 34229894
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

0,5


COMMENTS

LehrerSegal give a recurrence; both this reference and the Lehrer article give the first 50 terms.


REFERENCES

G. I. Lehrer and G. B. Segal, Homology stability for classical regular semisimple varieties, Math. Zeit., 236 (2001), 251290; p. 285.


LINKS

Table of n, a(n) for n=0..37.
G. I. Lehrer, Some sequences arising at the interface of representation theory and homotopy theory


CROSSREFS

Cf. A098788, A098789, A098705.
Sequence in context: A327744 A342340 A244470 * A164138 A320449 A263434
Adjacent sequences: A098784 A098785 A098786 * A098788 A098789 A098790


KEYWORD

nonn,easy,nice


AUTHOR

N. J. A. Sloane, Oct 28 2004


STATUS

approved



