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A335769
a(n) is the number of regions formed by n-secting the angles of an octagon.
4
1, 8, 25, 104, 321, 80, 617, 624, 745, 1056, 1617, 896, 2233, 2224, 2465, 3024, 3929, 2472, 4809, 4848, 5193, 5944, 7217, 5528, 8305, 8456, 8929, 9856, 11513, 9336, 12849, 13080, 13617, 14816, 16809, 13744, 18417, 18632, 19329, 20728, 23073, 19936, 25001
OFFSET
1,2
LINKS
Lars Blomberg, Illustration for n=3
Lars Blomberg, Illustration for n=4
Lars Blomberg, Illustration for n=19
Lars Blomberg, Illustration for n=20
CROSSREFS
Cf. A333075 (n-sected sides, not angles), A335770 (vertices), A335771 (edges), A335772 (ngons).
Sequence in context: A042637 A133661 A229443 * A139026 A135942 A181207
KEYWORD
nonn
AUTHOR
Lars Blomberg, Jun 23 2020
STATUS
approved