Number of ways to place 2 nonattacking kings on an n X n X n X n raumschach board (four-dimensional chessboard).

A194605

Number of ways to place 2 nonattacking kings on an n X n X n X n raumschach board (four-dimensional chessboard).

Terms

    a(0) =0a(1) =0a(2) =0a(3) =2080a(4) =27768a(5) =181032a(6) =807040a(7) =2817240a(8) =8271480a(9) =21328048a(10) =49692672a(11) =106717680a(12) =214322680a(13) =406928280a(14) =736614528a(15) =1279735912a(16) =2145244920a(17) =3484996320a(18) =5506324480a(19) =8487206208a(20) =12794341752a(21) =18904506760a(22) =27429548160a(23) =39145417080a(24) =55025652088a(25) =76279746192

External references