A143684 - cp's OEIS frontend

A143684 a(0) = a(1) = 0; thereafter a(n) = 2a(n-1)a(n-2) + 1.

n	a(n)
0	0
1	0
2	1
3	1
4	3
5	7
6	43
7	603
8	51859
9	62541955
10	6486726488691
11	811385112306041061811
12	10526466601050236861337066646958803
13	17082036570557873538131893815781561362696563088187144467
14	359626974875792367278553795120318710475396935851854517275793126801351587742904492716786003

[0, 0, 1, 1, 3, 7, 43, 603, 51859, 62541955, 6486726488691, 811385112306041061811, 10526466601050236861337066646958803, 17082036570557873538131893815781561362696563088187144467, 359626974875792367278553795120318710475396935851854517275793126801351587742904492716786003]

cp's OEIS Frontend

A143684 a(0) = a(1) = 0; thereafter a(n) = 2a(n-1)a(n-2) + 1.

Table of values

List of values

cp's OEIS Frontend

A143684 a(0) = a(1) = 0; thereafter a(n) = 2*a(n-1)*a(n-2) + 1.

Table of values

List of values

A143684 a(0) = a(1) = 0; thereafter a(n) = 2a(n-1)a(n-2) + 1.