Number of obtuse isosceles triangles on an n X n grid.

Terms

a(0) =0a(1) =0a(2) =0a(3) =4a(4) =36a(5) =100a(6) =256a(7) =496a(8) =968a(9) =1672a(10) =2736a(11) =4092a(12) =6188a(13) =8764a(14) =12144a(15) =16464a(16) =22224a(17) =28928a(18) =37400a(19) =47076a(20) =59244a(21) =73580a(22) =90344a(23) =109000a(24) =132048a(25) =158000a(26) =187528a(27) =220716a(28) =259348a(29) =301388