Number of nX2 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
A280212
Number of nX2 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.
Terms
- a(0) =1a(1) =2a(2) =26a(3) =92a(4) =307a(5) =1072a(6) =3541a(7) =11834a(8) =38687a(9) =125380a(10) =403369a(11) =1286926a(12) =4082099a(13) =12875608a(14) =40414141a(15) =126308002a(16) =393216967a(17) =1219867372a(18) =3772323793a(19) =11631678006a(20) =35769955803a(21) =109730814592a(22) =335856708581
External references
- oeis: A280212