A354733 - cp's OEIS frontend

A354733 a(0) = a(1) = 1; a(n) = 2 * Sum_{k=0..n-2} a(k) * a(n-k-2).

n	a(n)
0	1
1	1
2	2
3	4
4	10
5	24
6	64
7	168
8	464
9	1280
10	3624
11	10304
12	29728
13	86240
14	252480
15	743040
16	2200640
17	6547200
18	19571200
19	58727680
20	176883200
21	534476800
22	1619912320
23	4923070464
24	14999764480
25	45807916544
26	140196076544
27	429931051008
28	1320905583616
29	4065358827520

[1, 1, 2, 4, 10, 24, 64, 168, 464, 1280, 3624, 10304, 29728, 86240, 252480, 743040, 2200640, 6547200, 19571200, 58727680, 176883200, 534476800, 1619912320, 4923070464, 14999764480, 45807916544, 140196076544, 429931051008, 1320905583616, 4065358827520]

cp's OEIS Frontend

A354733 a(0) = a(1) = 1; a(n) = 2 * Sum_{k=0..n-2} a(k) * a(n-k-2).

Table of values

List of values