Number of n X 3 0..1 arrays with each 1 horizontally or vertically adjacent to 2 or 3 1's.
A295208
Number of n X 3 0..1 arrays with each 1 horizontally or vertically adjacent to 2 or 3 1's.
Terms
- a(0) =1a(1) =4a(2) =10a(3) =27a(4) =102a(5) =345a(6) =1162a(7) =4072a(8) =14224a(9) =49604a(10) =173594a(11) =607485a(12) =2125150a(13) =7436416a(14) =26022865a(15) =91060814a(16) =318652127a(17) =1115077417a(18) =3902040209a(19) =13654599697a(20) =47782246634a(21) =167206840944a(22) =585115414586
External references
- oeis: A295208