A287582 - cp's OEIS frontend

A287582 Number of set partitions of [n] such that all absolute differences between least elements of consecutive blocks and between consecutive elements within the blocks are not larger than three.

n	a(n)
0	1
1	1
2	2
3	5
4	15
5	46
6	139
7	410
8	1189
9	3397
10	9615
11	27056
12	75838
13	212088
14	592314
15	1652806
16	4609789
17	12853354
18	35832568
19	99884249
20	278414160
21	776016655
22	2162929636
23	6028494326
24	16802444328
25	46831107603
26	130525521011
27	363794294041
28	1013948759937
29	2826024652739

[1, 1, 2, 5, 15, 46, 139, 410, 1189, 3397, 9615, 27056, 75838, 212088, 592314, 1652806, 4609789, 12853354, 35832568, 99884249, 278414160, 776016655, 2162929636, 6028494326, 16802444328, 46831107603, 130525521011, 363794294041, 1013948759937, 2826024652739]

cp's OEIS Frontend

A287582 Number of set partitions of [n] such that all absolute differences between least elements of consecutive blocks and between consecutive elements within the blocks are not larger than three.

Table of values

List of values