A352436 - cp's OEIS frontend

A352436 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/3)} binomial(n,3k+1) a(k) * a(n-3*k-1).

n	a(n)
0	1
1	1
2	2
3	6
4	25
5	130
6	810
7	5882
8	48822
9	455922
10	4730766
11	53996052
12	672326226
13	9069015409
14	131742237040
15	2050468853310
16	34041605882650
17	600476252401332
18	11215153375288308
19	221103539006813514
20	4588413676426217916
21	99981290070561391848
22	2282329233032693093114

[1, 1, 2, 6, 25, 130, 810, 5882, 48822, 455922, 4730766, 53996052, 672326226, 9069015409, 131742237040, 2050468853310, 34041605882650, 600476252401332, 11215153375288308, 221103539006813514, 4588413676426217916, 99981290070561391848, 2282329233032693093114]

cp's OEIS Frontend

A352436 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/3)} binomial(n,3k+1) a(k) * a(n-3*k-1).

Table of values

List of values

cp's OEIS Frontend

A352436 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/3)} binomial(n,3*k+1) * a(k) * a(n-3*k-1).

Table of values

List of values

A352436 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/3)} binomial(n,3k+1) a(k) * a(n-3*k-1).