A355384 - cp's OEIS frontend

A355384 Number of pairs (y, v) where y is a composition of n and v is a (not necessarily contiguous) subsequence of y whose length equals the number of distinct parts in y.

n	a(n)
0	1
1	1
2	2
3	4
4	12
5	30
6	66
7	164
8	419
9	1049
10	2625
11	6372
12	15451
13	37335
14	89855
15	216523
16	518714
17	1235897
18	2930050
19	6911149
20	16217817
21	37914515
22	88304358
23	204971388
24	474172899
25	1093547574
26	2513959446
27	5761735383
28	13165908506
29	29998936859
30	68164839887
31	154478212575

[1, 1, 2, 4, 12, 30, 66, 164, 419, 1049, 2625, 6372, 15451, 37335, 89855, 216523, 518714, 1235897, 2930050, 6911149, 16217817, 37914515, 88304358, 204971388, 474172899, 1093547574, 2513959446, 5761735383, 13165908506, 29998936859, 68164839887, 154478212575]

cp's OEIS Frontend

A355384 Number of pairs (y, v) where y is a composition of n and v is a (not necessarily contiguous) subsequence of y whose length equals the number of distinct parts in y.

Table of values

List of values