Number of (n+1) X 2 0..1 arrays with the sums of 2 X 2 subblocks nondecreasing rightwards and downwards.
A204032
Number of (n+1) X 2 0..1 arrays with the sums of 2 X 2 subblocks nondecreasing rightwards and downwards.
Terms
- a(0) =16a(1) =44a(2) =121a(3) =286a(4) =676a(5) =1482a(6) =3249a(7) =6840a(8) =14400a(9) =29640a(10) =61009a(11) =123994a(12) =252004a(13) =508526a(14) =1026169a(15) =2062468a(16) =4145296a(17) =8312988a(18) =16670889a(19) =33390774a(20) =66879684a(21) =133865682a(22) =267944161a(23) =536117488a(24) =1072693504a(25) =2145878288a(26) =4292739361a(27) =8586527026
External references
- oeis: A204032