Number of nX4 0..1 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.
A280065
Number of nX4 0..1 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.
Terms
- a(0) =2a(1) =4a(2) =15a(3) =52a(4) =170a(5) =603a(6) =2157a(7) =7777a(8) =28195a(9) =102429a(10) =372430a(11) =1355019a(12) =4930977a(13) =17946466a(14) =65320396a(15) =237756751a(16) =865411414a(17) =3150039989a(18) =11465974491a(19) =41735611962a(20) =151915810407a(21) =552967220870
External references
- oeis: A280065