Number of collinear triples of distinct points in Zn x Zn with no two on the same "horizontal" or "vertical" line.

A146557

Number of collinear triples of distinct points in Zn x Zn with no two on the same "horizontal" or "vertical" line.

Terms

    a(0) =0a(1) =0a(2) =6a(3) =32a(4) =200a(5) =384a(6) =1470a(7) =2688a(8) =5400a(9) =9600a(10) =18150a(11) =27168a(12) =44616a(13) =65856a(14) =90150a(15) =140800a(16) =184960a(17) =274320a(18) =331398a(19) =474400a(20) =569184a(21) =774400a(22) =896126a(23) =1366656a(24) =1390000a(25) =1881984a(26) =2204982a(27) =2899232a(28) =2967048a(29) =4545600

External references