T(n,k)=Number of nXk array permutations with each element not moving, or moving one space E, S or NW.
A189610
T(n,k)=Number of nXk array permutations with each element not moving, or moving one space E, S or NW.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =1a(6) =1a(7) =6a(8) =6a(9) =1a(10) =1a(11) =13a(12) =20a(13) =13a(14) =1a(15) =1a(16) =28a(17) =72a(18) =72a(19) =28a(20) =1a(21) =1a(22) =60a(23) =256a(24) =464a(25) =256a(26) =60a(27) =1a(28) =1a(29) =129
External references
- oeis: A189610