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A115578 Array read by rows: row n (>= 1) gives the Betti numbers for the n-th element of the affine Weyl group of type A3_tilde (in Goresky's standard ordering). 0

%I

%S 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,

%T 2,1,1,2,1,1,2,2,1,1,3,3,1,1,3,3,1,1,3,3,1,1,3,3,1,1,2,2,1,1,3,3,1,1,

%U 3,3,1,1,3,3,1,1,2,2,1,1,3,3,1,1,3,3,1,1,3,3,1,1,3,3,1,1,3,3,1

%N Array read by rows: row n (>= 1) gives the Betti numbers for the n-th element of the affine Weyl group of type A3_tilde (in Goresky's standard ordering).

%C There are infinitely many rows.

%H Mark Goresky, <a href="http://www.math.ias.edu/~goresky/tables.html">Tables of Kazhdan-Lusztig polynomials</a>

%e Array begins:

%e 1

%e 1 1

%e 1 1

%e 1 1

%e 1 1

%e 1 2 1

%e 1 2 1

%e 1 2 1

%e 1 2 1

%Y Cf. A115570-A115583.

%K nonn,tabf

%O 1,11

%A _Roger L. Bagula_, Mar 04 2006

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Last modified June 14 21:27 EDT 2021. Contains 345041 sequences. (Running on oeis4.)