Number of nX6 binary arrays with every 1 having exactly three king-move neighbors equal to 1.

A183453

Number of nX6 binary arrays with every 1 having exactly three king-move neighbors equal to 1.

Terms

    a(0) =1a(1) =9a(2) =23a(3) =43a(4) =147a(5) =439a(6) =1077a(7) =3005a(8) =8707a(9) =23625a(10) =64333a(11) =181321a(12) =509237a(13) =1397553a(14) =3922583a(15) =11252577a(16) =31296857a(17) =88869587a(18) =262342415a(19) =745005339a(20) =2165854075a(21) =6666351495a(22) =19567488007a(23) =58799922721a(24) =190395211135a(25) =583866245179

External references