Number of isosceles triangles that can be formed from the n^2 points of n X n grid of points (or geoboard).

A186434

Number of isosceles triangles that can be formed from the n^2 points of n X n grid of points (or geoboard).

Terms

    a(0) =0a(1) =4a(2) =36a(3) =148a(4) =444a(5) =1064a(6) =2200a(7) =4024a(8) =6976a(9) =11284a(10) =17396a(11) =25620a(12) =36812a(13) =51216a(14) =69672a(15) =92656a(16) =121392a(17) =156092a(18) =198364a(19) =248292a(20) =307988a(21) =377816a(22) =459072a(23) =552216a(24) =660704a(25) =784076a(26) =924340a(27) =1082228a(28) =1261132a(29) =1460408

External references