Number of n X 2 0..3 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.
A201445
Number of n X 2 0..3 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.
Terms
- a(0) =6a(1) =2a(2) =21a(3) =9a(4) =56a(5) =13a(6) =110a(7) =32a(8) =198a(9) =41a(10) =315a(11) =78a(12) =480a(13) =94a(14) =684a(15) =155a(16) =950a(17) =180a(18) =1265a(19) =271a(20) =1656a(21) =307a(22) =2106a(23) =434a(24) =2646a(25) =483a(26) =3255a(27) =652a(28) =3968a(29) =716
External references
- oeis: A201445