A264781 - cp's OEIS frontend

A264781 Number T(n,k) of permutations of [n] with exactly k (possibly overlapping) occurrences of the consecutive pattern 45321; triangle T(n,k), n >= 0, 0 <= k <= max(0, floor((n-1)/4)), read by rows.

n	a(n)
0	1
1	1
2	2
3	6
4	24
5	119
6	1
7	708
8	12
9	4914
10	126
11	38976
12	1344
13	347765
14	15110
15	5
16	3447712
17	180736
18	352
19	37598286
20	2308548
21	9966
22	447294144
23	31481472
24	225984
25	5764747515
26	457520055
27	4753185
28	45
29	80011430240
30	7068885600
31	97954080
32	21280
33	1189835682714
34	115808906178

[1, 1, 2, 6, 24, 119, 1, 708, 12, 4914, 126, 38976, 1344, 347765, 15110, 5, 3447712, 180736, 352, 37598286, 2308548, 9966, 447294144, 31481472, 225984, 5764747515, 457520055, 4753185, 45, 80011430240, 7068885600, 97954080, 21280, 1189835682714, 115808906178]

cp's OEIS Frontend

A264781 Number T(n,k) of permutations of [n] with exactly k (possibly overlapping) occurrences of the consecutive pattern 45321; triangle T(n,k), n >= 0, 0 <= k <= max(0, floor((n-1)/4)), read by rows.

Table of values

List of values