Number of n X 2 0..2 arrays with new values 0..2 introduced in row major order and no element equal to any knight-move neighbor (colorings ignoring permutations of colors).
A208428
Number of n X 2 0..2 arrays with new values 0..2 introduced in row major order and no element equal to any knight-move neighbor (colorings ignoring permutations of colors).
Terms
- a(0) =2a(1) =14a(2) =54a(3) =216a(4) =864a(5) =3456a(6) =13824a(7) =55296a(8) =221184a(9) =884736a(10) =3538944a(11) =14155776a(12) =56623104a(13) =226492416a(14) =905969664a(15) =3623878656a(16) =14495514624a(17) =57982058496a(18) =231928233984a(19) =927712935936
External references
- oeis: A208428