Place n equally spaced points on each side of a square, and join each of these points by a chord to the 3*n new points on the other three sides: sequence gives number of interior vertices in the resulting planar graph.
A367277
Place n equally spaced points on each side of a square, and join each of these points by a chord to the 3*n new points on the other three sides: sequence gives number of interior vertices in the resulting planar graph.
Terms
- a(0) =0a(1) =1a(2) =57a(3) =329a(4) =1317a(5) =2861a(6) =7417a(7) =12801a(8) =23329a(9) =36549a(10) =64625a(11) =80085a(12) =138261a(13) =176829a(14) =233705a(15) =311949a(16) =455205a(17) =513205a(18) =741889a(19) =819509a(20) =1046161a(21) =1310673a(22) =1692869a(23) =1772001a(24) =2315189a(25) =2713893a(26) =3165017a(27) =3552641a(28) =4538729a(29) =4602865
External references
- oeis: A367277