A349426 - cp's OEIS frontend

A349426 Irregular triangle read by rows: T(n,k) is the number of arrangements of n labeled children with exactly k nontrivial rounds; n >= 3, 1 <= k <= floor(n/3).

n	a(n)
3	3
4	8
5	30
6	144
7	90
8	840
9	840
10	5760
11	7280
12	45360
13	66528
14	7560
15	403200
16	657720
17	151200
18	3991680
19	7064640
20	2356200
21	43545600
22	82285632
23	34890240
24	1247400
25	518918400
26	1035365760
27	521080560
28	43243200
29	6706022400
30	14013679680
31	8034586560
32	1059458400

[3, 8, 30, 144, 90, 840, 840, 5760, 7280, 45360, 66528, 7560, 403200, 657720, 151200, 3991680, 7064640, 2356200, 43545600, 82285632, 34890240, 1247400, 518918400, 1035365760, 521080560, 43243200, 6706022400, 14013679680, 8034586560, 1059458400]

cp's OEIS Frontend

A349426 Irregular triangle read by rows: T(n,k) is the number of arrangements of n labeled children with exactly k nontrivial rounds; n >= 3, 1 <= k <= floor(n/3).

Table of values

List of values