A373691 - cp's OEIS frontend

A373691 Triangle read by rows T(n, k) is the number of permutations on n elements whose square has k descents, for n >= 1 and 0 <= k <= n-1.

n	a(n)
1	1
2	2
3	0
4	4
5	2
6	0
7	10
8	6
9	6
10	2
11	26
12	22
13	48
14	22
15	2
16	76
17	68
18	276
19	260
20	40
21	0
22	232
23	214
24	1384
25	2204
26	944
27	62
28	0
29	764
30	672
31	6240
32	16172
33	13212
34	3048
35	200
36	12
37	2620
38	2204
39	27096
40	103588
41	145160
42	70740
43	10936
44	524
45	12
46	9496
47	7354
48	113722
49	612178
50	1338370
51	1145614
52	364366
53	36838
54	862
55	0

[1, 2, 0, 4, 2, 0, 10, 6, 6, 2, 26, 22, 48, 22, 2, 76, 68, 276, 260, 40, 0, 232, 214, 1384, 2204, 944, 62, 0, 764, 672, 6240, 16172, 13212, 3048, 200, 12, 2620, 2204, 27096, 103588, 145160, 70740, 10936, 524, 12, 9496, 7354, 113722, 612178, 1338370, 1145614, 364366, 36838, 862, 0]

cp's OEIS Frontend

A373691 Triangle read by rows T(n, k) is the number of permutations on n elements whose square has k descents, for n >= 1 and 0 <= k <= n-1.

Table of values

List of values