A025243 - cp's OEIS frontend

A025243 a(n) = a(1)a(n-1) + a(2)a(n-2) + ... + a(n-3)*a(3) for n >= 4, with initial terms 1, 2, 1, 1.

n	a(n)
1	1
2	2
3	1
4	1
5	3
6	6
7	14
8	33
9	79
10	194
11	482
12	1214
13	3090
14	7936
15	20544
16	53545
17	140399
18	370098
19	980226
20	2607242
21	6961462
22	18652112
23	50133616
24	135140598
25	365254226
26	989614976
27	2687312752
28	7312725944
29	19938170096
30	54460115308
31	149007155356
32	408341969073

[1, 2, 1, 1, 3, 6, 14, 33, 79, 194, 482, 1214, 3090, 7936, 20544, 53545, 140399, 370098, 980226, 2607242, 6961462, 18652112, 50133616, 135140598, 365254226, 989614976, 2687312752, 7312725944, 19938170096, 54460115308, 149007155356, 408341969073]

cp's OEIS Frontend

A025243 a(n) = a(1)a(n-1) + a(2)a(n-2) + ... + a(n-3)*a(3) for n >= 4, with initial terms 1, 2, 1, 1.

Table of values

List of values

cp's OEIS Frontend

A025243 a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ... + a(n-3)*a(3) for n >= 4, with initial terms 1, 2, 1, 1.

Table of values

List of values

A025243 a(n) = a(1)a(n-1) + a(2)a(n-2) + ... + a(n-3)*a(3) for n >= 4, with initial terms 1, 2, 1, 1.