Number of nX6 0..1 arrays with every element unequal to 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

A317739

Number of nX6 0..1 arrays with every element unequal to 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =0a(1) =9a(2) =4a(3) =23a(4) =38a(5) =22a(6) =36a(7) =140a(8) =146a(9) =218a(10) =736a(11) =1072a(12) =1890a(13) =4505a(14) =8860a(15) =16665a(16) =36236a(17) =77955a(18) =157132a(19) =339776a(20) =741215a(21) =1574853a(22) =3425156a(23) =7498971a(24) =16329476a(25) =35728895a(26) =78504972a(27) =172477510a(28) =378971254a(29) =834963467

External references