A045497 Packing density for n balls in complex projective plane using Fubini-Study metric (denominators).

1, 2, 4, 1, 25, 25, 64, 289, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1

Offset

1,2

Links

Table of n, a(n) for n=1..97.

D. McDuff, Symplectic Structures--A New Approach to Geometry, Notices Amer. Math. Soc. 45(8) (1998), pp. 952-960.

Index entries for linear recurrences with constant coefficients, signature (1).

Formula

a(n) = 1 for n >= 9 [from McDuff]. - Sean A. Irvine, Mar 12 2021

G.f.: x*(1 + x + 2*x^2 - 3*x^3 + 24*x^4 + 39*x^6 + 225*x^7 - 288*x^8)/(1 - x). - Elmo R. Oliveira, Aug 02 2024

Crossrefs

Cf. A045496, A030043.

Sequence in context: A214058 A173820 A030043 * A117258 A152285 A009417

Adjacent sequences: A045494 A045495 A045496 * A045498 A045499 A045500

Keyword

nonn,easy,frac

Author

N. J. A. Sloane

Status

approved