A384892 - cp's OEIS frontend

A384892 Number of permutations of {1..n} with all equal lengths of maximal runs (increasing by 1).

n	a(n)
0	1
1	1
2	2
3	4
4	13
5	54
6	314
7	2120
8	16700
9	148333
10	1468512
11	16019532
12	190899736
13	2467007774
14	34361896102
15	513137616840
16	8178130784179
17	138547156531410
18	2486151753462260
19	47106033220679060
20	939765362754015750
21	19690321886243848784
22	432292066866187743954

[1, 1, 2, 4, 13, 54, 314, 2120, 16700, 148333, 1468512, 16019532, 190899736, 2467007774, 34361896102, 513137616840, 8178130784179, 138547156531410, 2486151753462260, 47106033220679060, 939765362754015750, 19690321886243848784, 432292066866187743954]

cp's OEIS Frontend

A384892 Number of permutations of {1..n} with all equal lengths of maximal runs (increasing by 1).

Table of values

List of values