[seqfan] Re: Spiral generated from A001045 a(n) = a(n-1) + 2*a(n-2)

[apovolot at gmail.com]

Perhaps this question re spirals should be examined by converting A001045 explicit formula into polar coordinates ...

r*sin(theta)= 1/3*(2^(r*cos(theta)) - (-1)^(r*cos(theta)))

Alexander R. Povolotsky