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A333460 Number of edges in an diagonal-edged (or diamond-shaped) checkerboard with width and height 2*n-1 (see Comments in A333434 for definition). 3
8, 172, 1864, 9396, 28188, 72688, 153240, 269680, 500344, 795344, 1158752, 1820428, 2506948, 3477052, 4772708, 6313892, 8116916, 10200156, 13320308, 16199876, 20189488, 24692976, 28950448, 36096712, 41795388, 49216724, 58997920 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

See A333434 for the definition and images of the checkerboard.

LINKS

Table of n, a(n) for n=1..27.

CROSSREFS

Cf. A333434 (regions), A333458 (n-gons), A333459 (vertices), A333027, A333036, A333283.

Sequence in context: A301444 A333036 A247729 * A221060 A303285 A061492

Adjacent sequences:  A333457 A333458 A333459 * A333461 A333462 A333463

KEYWORD

nonn,more

AUTHOR

Scott R. Shannon and N. J. A. Sloane, Mar 22 2020

EXTENSIONS

a(8)-a(27) from Lars Blomberg, Jun 03 2020

STATUS

approved

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