A352437 - cp's OEIS frontend

A352437 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/4)} binomial(n,4k+1) a(k) * a(n-4*k-1).

n	a(n)
0	1
1	1
2	2
3	6
4	24
5	121
6	732
7	5166
8	41664
9	378002
10	3810532
11	42254256
12	511145184
13	6698543286
14	94536850576
15	1429503114816
16	23056734645504
17	395129481418584
18	7169760547544240
19	137325429039660432
20	2768685793537965504
21	58611883690279194361
22	1299873446056852916876

[1, 1, 2, 6, 24, 121, 732, 5166, 41664, 378002, 3810532, 42254256, 511145184, 6698543286, 94536850576, 1429503114816, 23056734645504, 395129481418584, 7169760547544240, 137325429039660432, 2768685793537965504, 58611883690279194361, 1299873446056852916876]

cp's OEIS Frontend

A352437 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/4)} binomial(n,4k+1) a(k) * a(n-4*k-1).

Table of values

List of values

cp's OEIS Frontend

A352437 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/4)} binomial(n,4*k+1) * a(k) * a(n-4*k-1).

Table of values

List of values

A352437 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/4)} binomial(n,4k+1) a(k) * a(n-4*k-1).