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 A115571 Array read by rows: row n (n>= 1) gives the Betti numbers for the n-th element of the affine Weyl group of type A2_tilde (in Goresky's standard ordering). 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, 2, 1, 1, 3, 3, 1, 1, 2, 2, 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, 4, 3, 1, 1, 3, 5, 4, 1, 1, 3, 4, 3, 1, 1, 3, 4, 3, 1, 1, 3, 5, 4, 1, 1, 3, 4, 3, 1, 1, 3, 5, 4, 1, 1, 3, 5 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,9 COMMENTS There are infinitely many rows. LINKS Mark Goresky, TABLES OF KAZHDAN-LUSZTIG POLYNOMIALS EXAMPLE Array begins: 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 2 1 CROSSREFS Sequence in context: A152847 A152846 A152845 * A333805 A152844 A115580 Adjacent sequences:  A115568 A115569 A115570 * A115572 A115573 A115574 KEYWORD nonn,tabf AUTHOR Roger L. Bagula, Mar 02 2006 STATUS approved

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Last modified June 22 11:59 EDT 2021. Contains 345375 sequences. (Running on oeis4.)