A276123 - cp's OEIS frontend

A276123 a(0) = a(1) = a(2) = 1; for n > 2, a(n) = (a(n-1) + 1)*(a(n-2) + 1) / a(n-3).

n	a(n)
0	1
1	1
2	1
3	4
4	10
5	55
6	154
7	868
8	2449
9	13825
10	39025
11	220324
12	621946
13	3511351
14	9912106
15	55961284
16	157971745
17	891869185
18	2517635809
19	14213945668
20	40124201194
21	226531261495
22	639469583290
23	3610286238244
24	10191389131441
25	57538048550401
26	162422756519761

[1, 1, 1, 4, 10, 55, 154, 868, 2449, 13825, 39025, 220324, 621946, 3511351, 9912106, 55961284, 157971745, 891869185, 2517635809, 14213945668, 40124201194, 226531261495, 639469583290, 3610286238244, 10191389131441, 57538048550401, 162422756519761]

cp's OEIS Frontend

A276123 a(0) = a(1) = a(2) = 1; for n > 2, a(n) = (a(n-1) + 1)*(a(n-2) + 1) / a(n-3).

Table of values

List of values