A386203 - cp's OEIS frontend

A386203 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/4)} binomial(n-1,4k) a(4k) a(n-1-4*k).

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	2
6	7
7	22
8	57
9	184
10	949
11	4984
12	21649
13	99728
14	659443
15	4777648
16	29500593
17	179618176
18	1441372201
19	13153104256
20	105727977601
21	808208897792
22	7631709900607
23	83311277669632
24	825548919414057
25	7638849184574464
26	83126488334117149
27	1050853652511099904

[1, 1, 1, 1, 1, 2, 7, 22, 57, 184, 949, 4984, 21649, 99728, 659443, 4777648, 29500593, 179618176, 1441372201, 13153104256, 105727977601, 808208897792, 7631709900607, 83311277669632, 825548919414057, 7638849184574464, 83126488334117149, 1050853652511099904]

cp's OEIS Frontend

A386203 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/4)} binomial(n-1,4k) a(4k) a(n-1-4*k).

Table of values

List of values

cp's OEIS Frontend

A386203 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/4)} binomial(n-1,4*k) * a(4*k) * a(n-1-4*k).

Table of values

List of values

A386203 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/4)} binomial(n-1,4k) a(4k) a(n-1-4*k).