Number of 5Xn 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 2 neighboring 1s.

A297302

Number of 5Xn 0..1 arrays with every 1 horizontally or antidiagonally adjacent to 2 neighboring 1s.

Terms

    a(0) =1a(1) =1a(2) =8a(3) =19a(4) =49a(5) =157a(6) =600a(7) =2161a(8) =7479a(9) =25639a(10) =88307a(11) =306281a(12) =1066691a(13) =3716461a(14) =12931923a(15) =44953528a(16) =156232914a(17) =543075295a(18) =1888104965a(19) =6564738537a(20) =22824408491a(21) =79353796243a(22) =275886391011a(23) =959166284191

External references