a(n) is the number of squares of side length greater than 1 having vertices at the points of an n X n grid of dots.

A328152

a(n) is the number of squares of side length greater than 1 having vertices at the points of an n X n grid of dots.

Terms

    a(0) =0a(1) =0a(2) =2a(3) =11a(4) =34a(5) =80a(6) =160a(7) =287a(8) =476a(9) =744a(10) =1110a(11) =1595a(12) =2222a(13) =3016a(14) =4004a(15) =5215a(16) =6680a(17) =8432a(18) =10506a(19) =12939a(20) =15770a(21) =19040a(22) =22792a(23) =27071a(24) =31924a(25) =37400a(26) =43550a(27) =50427a(28) =58086a(29) =66584

External references