Number of ways to choose three distinct points from a 4 X n grid so that they form an isosceles triangle.

A271913

Number of ways to choose three distinct points from a 4 X n grid so that they form an isosceles triangle.

Terms

    a(0) =0a(1) =16a(2) =68a(3) =148a(4) =248a(5) =360a(6) =488a(7) =620a(8) =768a(9) =924a(10) =1096a(11) =1272a(12) =1464a(13) =1660a(14) =1872a(15) =2088a(16) =2320a(17) =2556a(18) =2808a(19) =3064a(20) =3336a(21) =3612a(22) =3904a(23) =4200a(24) =4512a(25) =4828a(26) =5160a(27) =5496a(28) =5848a(29) =6204

External references