Number of points that are the intersections of exactly two semicircles in the configuration A290447(n).

A292103

Number of points that are the intersections of exactly two semicircles in the configuration A290447(n).

Terms

    a(0) =0a(1) =0a(2) =0a(3) =1a(4) =5a(5) =15a(6) =35a(7) =70a(8) =123a(9) =195a(10) =285a(11) =420a(12) =586a(13) =818a(14) =1110a(15) =1451a(16) =1846a(17) =2361a(18) =2956a(19) =3704a(20) =4567a(21) =5530a(22) =6631a(23) =7963a(24) =9443a(25) =11113a(26) =13005a(27) =15111a(28) =17450a(29) =20167

External references