A025276 - cp's OEIS frontend

A025276 a(n) = a(1)a(n-1) + a(2)a(n-2) + ... + a(n-1)*a(1) for n >= 5, with a(1) = 1, a(2) = a(3) = 0, a(4) = 1.

n	a(n)
1	1
2	0
3	0
4	1
5	2
6	4
7	8
8	17
9	38
10	88
11	208
12	498
13	1204
14	2936
15	7216
16	17861
17	44486
18	111408
19	280352
20	708526
21	1797564
22	4576472
23	11688496
24	29939786
25	76894684
26	197974480
27	510864480
28	1321031716
29	3422685992
30	8884010928
31	23098674400
32	60152509613
33	156879556678

[1, 0, 0, 1, 2, 4, 8, 17, 38, 88, 208, 498, 1204, 2936, 7216, 17861, 44486, 111408, 280352, 708526, 1797564, 4576472, 11688496, 29939786, 76894684, 197974480, 510864480, 1321031716, 3422685992, 8884010928, 23098674400, 60152509613, 156879556678]

cp's OEIS Frontend

A025276 a(n) = a(1)a(n-1) + a(2)a(n-2) + ... + a(n-1)*a(1) for n >= 5, with a(1) = 1, a(2) = a(3) = 0, a(4) = 1.

Table of values

List of values

cp's OEIS Frontend

A025276 a(n) = a(1)*a(n-1) + a(2)*a(n-2) + ... + a(n-1)*a(1) for n >= 5, with a(1) = 1, a(2) = a(3) = 0, a(4) = 1.

Table of values

List of values

A025276 a(n) = a(1)a(n-1) + a(2)a(n-2) + ... + a(n-1)*a(1) for n >= 5, with a(1) = 1, a(2) = a(3) = 0, a(4) = 1.