A006721 - cp's OEIS frontend

A006721 Somos-5 sequence: a(n) = (a(n-1) * a(n-4) + a(n-2) * a(n-3)) / a(n-5), with a(0) = a(1) = a(2) = a(3) = a(4) = 1.

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	2
6	3
7	5
8	11
9	37
10	83
11	274
12	1217
13	6161
14	22833
15	165713
16	1249441
17	9434290
18	68570323
19	1013908933
20	11548470571
21	142844426789
22	2279343327171
23	57760865728994
24	979023970244321
25	23510036246274433
26	771025645214210753

[1, 1, 1, 1, 1, 2, 3, 5, 11, 37, 83, 274, 1217, 6161, 22833, 165713, 1249441, 9434290, 68570323, 1013908933, 11548470571, 142844426789, 2279343327171, 57760865728994, 979023970244321, 23510036246274433, 771025645214210753]

cp's OEIS Frontend

A006721 Somos-5 sequence: a(n) = (a(n-1) * a(n-4) + a(n-2) * a(n-3)) / a(n-5), with a(0) = a(1) = a(2) = a(3) = a(4) = 1.

Table of values

List of values