A352008 - cp's OEIS frontend

A352008 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/2)} 4^k * a(k) * a(n-2*k-1).

n	a(n)
0	1
1	1
2	1
3	5
4	9
5	29
6	65
7	437
8	953
9	3981
10	10097
11	49829
12	123241
13	516349
14	1400737
15	10203285
16	24698905
17	111642477
18	304787665
19	1704790917
20	4392726473
21	19951366877
22	56296655617
23	336083829621
24	878995865721
25	3974885167949
26	11362790432305
27	60789762148453
28	165051865924137

[1, 1, 1, 5, 9, 29, 65, 437, 953, 3981, 10097, 49829, 123241, 516349, 1400737, 10203285, 24698905, 111642477, 304787665, 1704790917, 4392726473, 19951366877, 56296655617, 336083829621, 878995865721, 3974885167949, 11362790432305, 60789762148453, 165051865924137]

cp's OEIS Frontend

A352008 a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/2)} 4^k * a(k) * a(n-2*k-1).

Table of values

List of values