Number of non-equivalent ways under symmetry in one axis that 2 non-attacking kings of different colors can be placed on an n X n board.

A357740

Number of non-equivalent ways under symmetry in one axis that 2 non-attacking kings of different colors can be placed on an n X n board.

Terms

    a(0) =0a(1) =0a(2) =17a(3) =78a(4) =234a(5) =520a(6) =1035a(7) =1806a(8) =2996a(9) =4608a(10) =6885a(11) =9790a(12) =13662a(13) =18408a(14) =24479a(15) =31710a(16) =40680a(17) =51136a(18) =63801a(19) =78318a(20) =95570a(21) =115080a(22) =137907a(23) =163438a(24) =192924a(25) =225600a(26) =262925a(27) =303966a(28) =350406a(29) =401128

External references