Number of 2 X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 4 neighboring 1s.

A297583

Number of 2 X n 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 1 or 4 neighboring 1s.

Terms

    a(0) =1a(1) =5a(2) =11a(3) =17a(4) =39a(5) =93a(6) =183a(7) =373a(8) =823a(9) =1741a(10) =3599a(11) =7637a(12) =16247a(13) =34125a(14) =71871a(15) =152133a(16) =321127a(17) =676861a(18) =1429135a(19) =3017909a(20) =6367607a(21) =13437869a(22) =28367775a(23) =59874021a(24) =126360711a(25) =266707549a(26) =562939183a(27) =1188130069a(28) =2507681687a(29) =5292853517

External references