Number of vertices in a complete bipartite graph where the vertices in the two parts are placed on opposite sides of a parabola at integer x coordinates |x| = 1, 2, ...n.
A392425
Number of vertices in a complete bipartite graph where the vertices in the two parts are placed on opposite sides of a parabola at integer x coordinates |x| = 1, 2, ...n.
Terms
- a(0) =2a(1) =5a(2) =15a(3) =42a(4) =100a(5) =205a(6) =393a(7) =676a(8) =1101a(9) =1710a(10) =2518a(11) =3637a(12) =5049a(13) =6860a(14) =9074a(15) =11783a(16) =15097a(17) =19039a(18) =23825a(19) =29473a(20) =35966a(21) =43545a(22) =52183a(23) =62338a(24) =73662a(25) =86429a(26) =100969a(27) =116904a(28) =134700a(29) =154855
External references
- oeis: A392425