Number of n X 2 0..2 arrays with no element equal to more than one of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.
A281124
Number of n X 2 0..2 arrays with no element equal to more than one of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.
Terms
- a(0) =0a(1) =2a(2) =28a(3) =208a(4) =1364a(5) =8354a(6) =48992a(7) =278966a(8) =1554744a(9) =8524848a(10) =46147848a(11) =247246206a(12) =1313446848a(13) =6927856426a(14) =36320588564a(15) =189426835088a(16) =983467437564
External references
- oeis: A281124