A115572 Array read by rows: row n (>= 1) gives the Betti numbers for the n-th element of the Weyl group of type A4 (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, 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, 1, 1, 3, 4

Offset

1,11

Comments

The array has 120 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: A115575 A115581 A115576 * A152847 A152846 A152845

Adjacent sequences: A115569 A115570 A115571 * A115573 A115574 A115575

Keyword

nonn,fini,tabf

Author

Roger L. Bagula, Mar 04 2006

Status

approved