Number of n X 2 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0 or 2 neighboring 1s.
A296329
Number of n X 2 0..1 arrays with each 1 horizontally, vertically or antidiagonally adjacent to 0 or 2 neighboring 1s.
Terms
- a(0) =3a(1) =8a(2) =19a(3) =47a(4) =116a(5) =286a(6) =705a(7) =1738a(8) =4285a(9) =10564a(10) =26044a(11) =64208a(12) =158296a(13) =390257a(14) =962125a(15) =2371987a(16) =5847808a(17) =14416967a(18) =35543051a(19) =87626508a(20) =216031114a(21) =532595025a(22) =1313039846a(23) =3237119305a(24) =7980672808a(25) =19675252120a(26) =48506630368a(27) =119586431488
External references
- oeis: A296329