Triangle T(m,k) read by rows, where T(m,k) is the number of ways in which 1<=k<=m positions can be picked in an m X m square grid such that the picked positions have a point symmetry but no line symmetry.
A292155
Triangle T(m,k) read by rows, where T(m,k) is the number of ways in which 1<=k<=m positions can be picked in an m X m square grid such that the picked positions have a point symmetry but no line symmetry.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =0a(9) =112a(10) =0a(11) =0a(12) =0a(13) =528a(14) =128a(15) =0a(16) =0a(17) =0a(18) =1800a(19) =336a(20) =5928a(21) =0a(22) =0a(23) =0a(24) =4908a(25) =1156a(26) =22628a(27) =5676a(28) =0a(29) =0
External references
- oeis: A292155