A350273 - cp's OEIS frontend

A350273 Irregular triangle read by rows: T(n,k) is the number of n-permutations whose fourth-longest cycle has length exactly k; n >= 0, 0 <= k <= floor(n/4).

n	a(n)
0	1
1	1
2	2
3	6
4	23
5	1
6	109
7	11
8	619
9	101
10	4108
11	932
12	31240
13	8975
14	105
15	268028
16	91387
17	3465
18	2562156
19	991674
20	74970
21	27011016
22	11514394
23	1391390
24	311378616
25	143188574
26	24188010
27	246400
28	3897004032
29	1905067958
30	412136010
31	12812800
32	52626496896
33	27059601596
34	7053834788
35	438357920

[1, 1, 2, 6, 23, 1, 109, 11, 619, 101, 4108, 932, 31240, 8975, 105, 268028, 91387, 3465, 2562156, 991674, 74970, 27011016, 11514394, 1391390, 311378616, 143188574, 24188010, 246400, 3897004032, 1905067958, 412136010, 12812800, 52626496896, 27059601596, 7053834788, 438357920]

cp's OEIS Frontend

A350273 Irregular triangle read by rows: T(n,k) is the number of n-permutations whose fourth-longest cycle has length exactly k; n >= 0, 0 <= k <= floor(n/4).

Table of values

List of values