Mark the points of the Farey series F_n on a strip of paper and wrap it around a circle of circumference 1 so the endpoints 0 and 1 coincide; draw a chord between every pair of the Farey points; a(n) is the number of vertices in the resulting graph.
A359116
Mark the points of the Farey series F_n on a strip of paper and wrap it around a circle of circumference 1 so the endpoints 0 and 1 coincide; draw a chord between every pair of the Farey points; a(n) is the number of vertices in the resulting graph.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =19a(4) =208a(5) =480a(6) =3011a(7) =7185a(8) =20169a(9) =35438a(10) =111232a(11) =162062a(12) =422841a(13) =633226a(14) =1024370a(15) =1576122a(16) =3315790a(17) =4240974a(18) =8204951a(19) =10654475a(20) =15310713
External references
- oeis: A359116