A327024 - cp's OEIS frontend

A327024 Ordered set partitions of the set {1, 2, ..., 4*n} with all block sizes divisible by 4, irregular triangle T(n, k) for n >= 0 and 0 <= k < A000041(n), read by rows.

n	a(n)
0	1
1	1
2	1
3	70
4	1
5	990
6	34650
7	1
8	3640
9	12870
10	2702700
11	63063000
12	1
13	9690
14	251940
15	26453700
16	187065450
17	17459442000
18	305540235000
19	1
20	21252
21	1470942
22	2704156
23	154448910
24	8031343320
25	9465511770
26	374796021600
27	3975514943400
28	231905038365000
29	3246670537110000

[1, 1, 1, 70, 1, 990, 34650, 1, 3640, 12870, 2702700, 63063000, 1, 9690, 251940, 26453700, 187065450, 17459442000, 305540235000, 1, 21252, 1470942, 2704156, 154448910, 8031343320, 9465511770, 374796021600, 3975514943400, 231905038365000, 3246670537110000]

cp's OEIS Frontend

A327024 Ordered set partitions of the set {1, 2, ..., 4*n} with all block sizes divisible by 4, irregular triangle T(n, k) for n >= 0 and 0 <= k < A000041(n), read by rows.

Table of values

List of values