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

0,1

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.

Sequence in context: A355086 A337951 A092817 * A333459 A362101 A307700

Adjacent sequences: A333032 A333033 A333034 * A333036 A333037 A333038

Keyword

nonn

Author

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

Extensions

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

Status

approved