A025262 - cp's OEIS frontend

A025262 a(n) = a(1)a(n-1) + a(2)a(n-2) + ... + a(n-1)*a(1) for n >= 4.

n	a(n)
1	1
2	1
3	1
4	3
5	8
6	23
7	68
8	207
9	644
10	2040
11	6558
12	21343
13	70186
14	232864
15	778550
16	2620459
17	8872074
18	30195288
19	103246502
20	354508628
21	1221846856
22	4225644866
23	14659644348
24	51002664023
25	177909901566
26	622093882290
27	2180123564130
28	7656055966092

[1, 1, 1, 3, 8, 23, 68, 207, 644, 2040, 6558, 21343, 70186, 232864, 778550, 2620459, 8872074, 30195288, 103246502, 354508628, 1221846856, 4225644866, 14659644348, 51002664023, 177909901566, 622093882290, 2180123564130, 7656055966092]

cp's OEIS Frontend

A025262 a(n) = a(1)a(n-1) + a(2)a(n-2) + ... + a(n-1)*a(1) for n >= 4.

Table of values

List of values

cp's OEIS Frontend

A025262 a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ... + a(n-1)*a(1) for n >= 4.

Table of values

List of values

A025262 a(n) = a(1)a(n-1) + a(2)a(n-2) + ... + a(n-1)*a(1) for n >= 4.