Number of (n+1) X 2 0..1 arrays with the number of rightwards and downwards edge increases in each 2 X 2 subblock equal to the number in all its horizontal and vertical neighbors.
A206260
Number of (n+1) X 2 0..1 arrays with the number of rightwards and downwards edge increases in each 2 X 2 subblock equal to the number in all its horizontal and vertical neighbors.
Terms
- a(0) =16a(1) =24a(2) =34a(3) =50a(4) =72a(5) =105a(6) =154a(7) =229a(8) =345a(9) =527a(10) =815a(11) =1274a(12) =2009a(13) =3190a(14) =5092a(15) =8160a(16) =13114a(17) =21119a(18) =34060a(19) =54987a(20) =88835a(21) =143589a(22) =232169a(23) =375480a(24) =607347a(25) =982500a(26) =1589494a(27) =2571614a(28) =4160700a(29) =6731877
External references
- oeis: A206260