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A333036 Number of edges in an equal-armed cross with arms of length n (see Comments in A331456 for definition). 5
8, 172, 964, 3316, 8524, 18188, 34540, 59908, 97324, 150028, 221692, 316124, 438364, 592364, 784060, 1019468, 1304996, 1644900, 2047412, 2519172, 3068556, 3704004, 4434044, 5265868, 6211652, 7276492, 8474484, 9813996, 11304292, 12958380, 14791124, 16810732 (list; graph; refs; listen; history; text; internal format)
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), A333035 (vertices), A333037 (n-gons), A274586 , A332600, A331765.

Sequence in context: A300805 A317566 A301444 * A247729 A333460 A221060

Adjacent sequences:  A333033 A333034 A333035 * A333037 A333038 A333039

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

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Last modified August 18 14:22 EDT 2022. Contains 356215 sequences. (Running on oeis4.)