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 vertices in the resulting planar graph.
A367276
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 vertices in the resulting planar graph.
Terms
- a(0) =4a(1) =9a(2) =69a(3) =345a(4) =1337a(5) =2885a(6) =7445a(7) =12833a(8) =23365a(9) =36589a(10) =64669a(11) =80133a(12) =138313a(13) =176885a(14) =233765a(15) =312013a(16) =455273a(17) =513277a(18) =741965a(19) =819589a(20) =1046245a(21) =1310761a(22) =1692961a(23) =1772097a(24) =2315289a(25) =2713997a(26) =3165125a(27) =3552753a(28) =4538845a(29) =4602985
External references
- oeis: A367276