A358302 Number of triangular regions in the Farey Diagram Farey(n,n), divided by 4.

1, 12, 100, 392, 1554, 3486, 9690, 18942, 38610, 65268, 125116, 186870, 324646, 472546, 713354, 1003888, 1531908, 2000638, 2920970, 3780950

Offset

1,2

Comments

This is the leading column in A358885, divided by 4.

It would be nice to have a formula.

Links

Table of n, a(n) for n=1..20.

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: A322721 A367607 A123902 * A085374 A016283 A243880

Adjacent sequences: A358299 A358300 A358301 * A358303 A358304 A358305

Keyword

nonn,more

Author

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

Status

approved