

A263486


Triangle read by rows: T(n,k) (n>=2, k>=1) is the number of permutations w of n for which the KazhdanLusztig polynomial P(id,w;q) evaluated to k at q=1.


0




OFFSET

2,1


COMMENTS

Row sums give A000142, n >= 2.


LINKS

Table of n, a(n) for n=2..9.
FindStat  Combinatorial Statistic Finder, The evaluation of the KazhdanLusztig polynomial P(id,w) for each permutation w in S_n evaluated at q=1.
Wikipedia, KazhdanLusztig polynomial


EXAMPLE

Triangle begins:
2,
6,
22,2,
88,27,4,1,
...


CROSSREFS

Cf. A000142.
Sequence in context: A181754 A084392 A156155 * A182544 A216120 A216964
Adjacent sequences: A263483 A263484 A263485 * A263487 A263488 A263489


KEYWORD

nonn,tabf,more


AUTHOR

Christian Stump, Oct 19 2015


STATUS

approved



