Number of n X n 0..1 arrays with no element equal to more than two of its horizontal, vertical and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.
A280597
Number of n X n 0..1 arrays with no element equal to more than two of its horizontal, vertical and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.
Terms
- a(0) =1a(1) =7a(2) =45a(3) =302a(4) =1648a(5) =7594a(6) =31152a(7) =119656a(8) =446500a(9) =1658080a(10) =6210762a(11) =23592940a(12) =90908854a(13) =354490210a(14) =1394647332a(15) =5520750316
External references
- oeis: A280597