A014432 - cp's OEIS frontend

A014432 a(n) = Sum_{i=1..n-1} a(i)*a(n-1-i), with a(0) = 1, a(1) = 3.

n	a(n)
0	1
1	3
2	3
3	12
4	30
5	111
6	363
7	1353
8	4917
9	18777
10	71769
11	280506
12	1103556
13	4395009
14	17622309
15	71220828
16	289510662
17	1183627137
18	4862148753
19	20061888924
20	83100910530
21	345457823493
22	1440734205513
23	6026408186457
24	25275954499905
25	106277040064191

[1, 3, 3, 12, 30, 111, 363, 1353, 4917, 18777, 71769, 280506, 1103556, 4395009, 17622309, 71220828, 289510662, 1183627137, 4862148753, 20061888924, 83100910530, 345457823493, 1440734205513, 6026408186457, 25275954499905, 106277040064191]

cp's OEIS Frontend

A014432 a(n) = Sum_{i=1..n-1} a(i)*a(n-1-i), with a(0) = 1, a(1) = 3.

Table of values

List of values