a(1)=3; for n>1, a(n) is such that a(1)^2+...+a(n)^2 = (1+a(n))^2.
A127690
a(1)=3; for n>1, a(n) is such that a(1)^2+...+a(n)^2 = (1+a(n))^2.
Terms
- a(0) =3a(1) =4a(2) =12a(3) =84a(4) =3612a(5) =6526884
External references
- oeis: A127690
A127690
a(1)=3; for n>1, a(n) is such that a(1)^2+...+a(n)^2 = (1+a(n))^2.