Number of n X 2 0..1 arrays with no element equal to more than two of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

A281074

Number of n X 2 0..1 arrays with no element equal to more than two 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) =0a(2) =6a(3) =24a(4) =92a(5) =318a(6) =1056a(7) =3406a(8) =10770a(9) =33542a(10) =103226a(11) =314634a(12) =951396a(13) =2857604a(14) =8534022a(15) =25360354a(16) =75037878a(17) =221184144a(18) =649773710a(19) =1903099818a(20) =5558851080a(21) =16197428578a(22) =47091498180a(23) =136634149236a(24) =395704051072

External references