Number of n X 2 0..2 arrays with no element equal to more than one of its king-move neighbors and with new values introduced in order 0 sequentially upwards.
A280853
Number of n X 2 0..2 arrays with no element equal to more than one of its king-move neighbors and with new values introduced in order 0 sequentially upwards.
Terms
- a(0) =2a(1) =9a(2) =29a(3) =110a(4) =442a(5) =1708a(6) =6596a(7) =25624a(8) =99432a(9) =385584a(10) =1495696a(11) =5802080a(12) =22506144a(13) =87301312a(14) =338644032a(15) =1313606016a(16) =5095497344a(17) =19765519104a(18) =76670777600a(19) =297407202816
External references
- oeis: A280853