A355388 - cp's OEIS frontend

A355388 Number of composable pairs (y, v) of integer compositions of n, where a composition is regarded as an arrow from the number of parts to the number of distinct parts.

n	a(n)
0	1
1	1
2	2
3	6
4	18
5	58
6	174
7	536
8	1656
9	4947
10	14800
11	43157
12	126572
13	364070
14	1039926
15	2938898
16	8223400
17	22846370
18	62930113
19	172177400
20	467002792
21	1259736804
22	3371190792
23	8973530491
24	23728305128
25	62421018163
26	163255839779
27	424842462529
28	1100006243934
29	2834558927244
30	7270915592897

[1, 1, 2, 6, 18, 58, 174, 536, 1656, 4947, 14800, 43157, 126572, 364070, 1039926, 2938898, 8223400, 22846370, 62930113, 172177400, 467002792, 1259736804, 3371190792, 8973530491, 23728305128, 62421018163, 163255839779, 424842462529, 1100006243934, 2834558927244, 7270915592897]

cp's OEIS Frontend

A355388 Number of composable pairs (y, v) of integer compositions of n, where a composition is regarded as an arrow from the number of parts to the number of distinct parts.

Table of values

List of values