A025254 - cp's OEIS frontend

A025254 a(n) = a(1)a(n-1) + a(2)a(n-2) + ... + a(n-3)*a(3) for n >= 4, with initial terms 3, 1, 1, 3.

n	a(n)
1	3
2	1
3	1
4	3
5	10
6	34
7	118
8	417
9	1497
10	5448
11	20063
12	74649
13	280252
14	1060439
15	4040413
16	15488981
17	59701236
18	231236830
19	899559100
20	3513314664
21	13770811198
22	54152480421
23	213585706927
24	844723104691
25	3349274471386
26	13310603555085
27	53012829376985

[3, 1, 1, 3, 10, 34, 118, 417, 1497, 5448, 20063, 74649, 280252, 1060439, 4040413, 15488981, 59701236, 231236830, 899559100, 3513314664, 13770811198, 54152480421, 213585706927, 844723104691, 3349274471386, 13310603555085, 53012829376985]

cp's OEIS Frontend

A025254 a(n) = a(1)a(n-1) + a(2)a(n-2) + ... + a(n-3)*a(3) for n >= 4, with initial terms 3, 1, 1, 3.

Table of values

List of values

cp's OEIS Frontend

A025254 a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ... + a(n-3)*a(3) for n >= 4, with initial terms 3, 1, 1, 3.

Table of values

List of values

A025254 a(n) = a(1)a(n-1) + a(2)a(n-2) + ... + a(n-3)*a(3) for n >= 4, with initial terms 3, 1, 1, 3.