A333035 Number of vertices in an equal-armed cross with arms of length n (see Comments in A331456 for definition).

5, 69, 397, 1417, 3717, 8009, 15361, 26777, 43697, 67597, 100245, 143177, 199009, 269197, 356789, 464577, 595521, 751129, 935825, 1151881, 1403953, 1695765, 2031485, 2413337, 2848373, 3337781, 3888917, 4505277, 5191557, 5952313, 6796713, 7725945, 8747121

Offset: 0

Author

Scott R. Shannon and N. J. A. Sloane, Mar 06 2020

Keywords

• nonn

Comments

See the links in A331456 for images of the crosses.

Links

• Lars Blomberg, Table of n, a(n) for n = 0..48

Crossrefs

Cf. A331456 (regions), A333036 (edges), A333037 (n-gons), A092866, A332599, A007569.

Extensions

a(11) and beyond from Lars Blomberg, May 30 2020