A354736 - cp's OEIS frontend

A354736 a(0) = a(1) = 1; a(n) = 5 * Sum_{k=0..n-2} a(k) * a(n-k-2).

n	a(n)
0	1
1	1
2	5
3	10
4	55
5	150
6	775
7	2550
8	12500
9	46250
10	219375
11	875000
12	4075000
13	17071250
14	78796875
15	341100000
16	1569350000
17	6947531250
18	31966000000
19	143761750000
20	662668906250
21	3014440000000
22	13932834296875
23	63921914062500
24	296358191406250
25	1368603488281250
26	6365085546875000

[1, 1, 5, 10, 55, 150, 775, 2550, 12500, 46250, 219375, 875000, 4075000, 17071250, 78796875, 341100000, 1569350000, 6947531250, 31966000000, 143761750000, 662668906250, 3014440000000, 13932834296875, 63921914062500, 296358191406250, 1368603488281250, 6365085546875000]

cp's OEIS Frontend

A354736 a(0) = a(1) = 1; a(n) = 5 * Sum_{k=0..n-2} a(k) * a(n-k-2).

Table of values

List of values