Number of 4Xn 0..1 arrays with every element equal to 0, 1, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A303199
Number of 4Xn 0..1 arrays with every element equal to 0, 1, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =8a(1) =10a(2) =23a(3) =46a(4) =97a(5) =283a(6) =687a(7) =1642a(8) =3949a(9) =10169a(10) =25010a(11) =60900a(12) =149264a(13) =373120a(14) =920574a(15) =2259062a(16) =5562698a(17) =13784985a(18) =34019145a(19) =83759406a(20) =206523981a(21) =510324559a(22) =1259274155a(23) =3104524302a(24) =7657989177a(25) =18904333224a(26) =46644705875a(27) =115050987507
External references
- oeis: A303199