Number of ways to choose three distinct points from a 5 X n grid so that they form an isosceles triangle.

A271915

Number of ways to choose three distinct points from a 5 X n grid so that they form an isosceles triangle.

Terms

    a(0) =0a(1) =24a(2) =108a(3) =248a(4) =444a(5) =672a(6) =932a(7) =1204a(8) =1512a(9) =1836a(10) =2188a(11) =2548a(12) =2936a(13) =3332a(14) =3756a(15) =4192a(16) =4656a(17) =5128a(18) =5628a(19) =6136a(20) =6672a(21) =7216a(22) =7788a(23) =8368a(24) =8976a(25) =9592a(26) =10236a(27) =10888a(28) =11568a(29) =12256

External references