82993

Appears in sequences

• Maximal number of regions obtained by joining n points around a circle by straight lines. Also number of regions in 4-space formed by n-1 hyperplanes.at n=38A000127
• Place n equally-spaced points around a circle and join every pair of points by a chord; this divides the circle into a(n) regions.at n=38A006533
• Numbers k such that the last 9 digits of the k-th Lucas number are 1-9 pandigital.at n=27A216488