Number of irregular spiral (expanded spiral) appearing with n center points.
A236755
Number of irregular spiral (expanded spiral) appearing with n center points.
Terms
- a(0) =0a(1) =2a(2) =0a(3) =16a(4) =0a(5) =720a(6) =0a(7) =35712a(8) =0a(9) =3628800a(10) =0
External references
- oeis: A236755