A358303 - OEIS

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A358303

Number of 4-sided regions in the Farey Diagram Farey(n,n), divided by 8.

0

1, 13, 57, 231, 532, 1497, 2935, 6031, 10273, 19680, 29441, 51261, 74473, 112721, 159299, 242763, 317155, 462930, 598755

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OFFSET

1,2

COMMENTS

This is the second column in A358885, divided by 8.

It would be nice to have a formula.

LINKS

Table of n, a(n) for n=1..19.

CROSSREFS

The Farey Diagrams Farey(m,n) are studied in A358298-A358307 and A358882-A358885, the Completed Farey Diagrams of order (m,n) in A358886-A358889.

Sequence in context: A368813 A222161 A218593 * A212405 A147384 A147011

Adjacent sequences: A358300 A358301 A358302 * A358304 A358305 A358306

KEYWORD

nonn,more

AUTHOR

Scott R. Shannon and N. J. A. Sloane, Dec 06 2022

STATUS

approved