Number of nonequivalent (mod D_8) ways to place 4 points on an n X n point grid so that no point is equally distant from two other points on the same row or the same column.

A296999

Number of nonequivalent (mod D_8) ways to place 4 points on an n X n point grid so that no point is equally distant from two other points on the same row or the same column.

Terms

    a(0) =0a(1) =1a(2) =17a(3) =226a(4) =1550a(5) =7221a(6) =26120a(7) =78484a(8) =206242a(9) =486640a(10) =1056377a(11) =2137506a(12) =4085167a(13) =7430276a(14) =12964014a(15) =21801632a(16) =35520743a(17) =56249658a(18) =86880957a(19) =131186720a(20) =194133425a(21) =282024809a(22) =402949496a(23) =566950056a(24) =786640454a(25) =1077397347a(26) =1458190435a(27) =1951789266a(28) =2585856152a(29) =3393157995

External references