A127690 - cp's OEIS frontend

A127690 a(1)=3; for n>1, a(n) is such that a(1)^2+...+a(n)^2 = (1+a(n))^2.

n	a(n)
1	3
2	4
3	12
4	84
5	3612
6	6526884
7	21300113901612
8	226847426110843688722000884
9	25729877366557343481074291996721923093306518970391612
10	331013294649039928396936390888878360035026305412754995683702777533071737279144813617823976263475290370884

[3, 4, 12, 84, 3612, 6526884, 21300113901612, 226847426110843688722000884, 25729877366557343481074291996721923093306518970391612, 331013294649039928396936390888878360035026305412754995683702777533071737279144813617823976263475290370884]

cp's OEIS Frontend

A127690 a(1)=3; for n>1, a(n) is such that a(1)^2+...+a(n)^2 = (1+a(n))^2.

Table of values

List of values