Number of n X 5 0..1 arrays with each 1 horizontally or vertically adjacent to 2 or 4 1's.

A295202

Number of n X 5 0..1 arrays with each 1 horizontally or vertically adjacent to 2 or 4 1's.

Terms

    a(0) =1a(1) =6a(2) =25a(3) =108a(4) =438a(5) =1597a(6) =5831a(7) =21717a(8) =81590a(9) =307267a(10) =1154956a(11) =4332766a(12) =16247319a(13) =60941083a(14) =228640675a(15) =857901670a(16) =3218928203a(17) =12077227572a(18) =45312279618a(19) =170006395289a(20) =637847836695

External references