A007660 - cp's OEIS frontend

A007660 a(n) = a(n-1)*a(n-2) + 1 with a(0) = a(1) = 0.

n	a(n)
0	0
1	0
2	1
3	1
4	2
5	3
6	7
7	22
8	155
9	3411
10	528706
11	1803416167
12	953476947989903
13	1719515742866809222961802
14	1639518622529236077952144318816050685207
15	2819178082162327154499022366029959843954512194276761760087463015

[0, 0, 1, 1, 2, 3, 7, 22, 155, 3411, 528706, 1803416167, 953476947989903, 1719515742866809222961802, 1639518622529236077952144318816050685207, 2819178082162327154499022366029959843954512194276761760087463015]

cp's OEIS Frontend

A007660 a(n) = a(n-1)*a(n-2) + 1 with a(0) = a(1) = 0.

Table of values

List of values