A115575 Array read by rows: row n (>= 1) gives the Betti numbers for the n-th element of the Weyl group of type C4 (in Goresky's standard ordering).

1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 2, 1, 1, 2, 1, 1, 2, 1, 1, 2, 1, 1, 2, 1, 1, 2, 1, 1, 2, 1, 1, 2, 1, 1, 2, 2, 1, 1, 3, 3, 1, 1, 3, 3, 1, 1, 3, 3, 1, 1, 3, 3, 1, 1, 3, 3, 1, 1, 2, 2, 1, 1, 3, 3, 1, 1, 3, 3, 1, 1, 2, 2, 1, 1, 3, 3, 1, 1, 3, 3, 1, 1, 3, 3, 1, 1, 3, 3, 1, 1, 2, 2, 1, 1, 3, 3

Offset

1,11

Comments

The array has 384 rows.

Links

Table of n, a(n) for n=1..99.

Mark Goresky, Tables of Kazhdan-Lusztig polynomials

Example

Array begins:
1
1 1
1 1
1 1
1 1
1 2 1
1 2 1
1 2 1
1 2 1

Crossrefs

Cf. A115570-A115583.

Sequence in context: A115578 A152848 A115582 * A115581 A115576 A115572

Adjacent sequences: A115572 A115573 A115574 * A115576 A115577 A115578

Keyword

nonn,fini,tabf

Author

Roger L. Bagula, Mar 04 2006

Status

approved