A192721 - cp's OEIS frontend

A192721 The number of pairs of permutations in the product group S_n X S_n with k common descents, n >= 1 and 0 <= k <= n-1.

n	a(n)
1	1
2	3
3	1
4	19
5	16
6	1
7	211
8	299
9	65
10	1
11	3651
12	7346
13	3156
14	246
15	1
16	90921
17	237517
18	160322
19	28722
20	917
21	1
22	3081513
23	9903776
24	9302567
25	2864912
26	245407
27	3424
28	1
29	136407699
30	520507423
31	632274183
32	288196659
33	46261609
34	2041965
35	12861
36	1

[1, 3, 1, 19, 16, 1, 211, 299, 65, 1, 3651, 7346, 3156, 246, 1, 90921, 237517, 160322, 28722, 917, 1, 3081513, 9903776, 9302567, 2864912, 245407, 3424, 1, 136407699, 520507423, 632274183, 288196659, 46261609, 2041965, 12861, 1]

cp's OEIS Frontend

A192721 The number of pairs of permutations in the product group S_n X S_n with k common descents, n >= 1 and 0 <= k <= n-1.

Table of values

List of values