Number of nX3 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.
A201446
Number of nX3 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) =4a(1) =21a(2) =52a(3) =29a(4) =246a(5) =701a(6) =844a(7) =426a(8) =2478a(9) =5990a(10) =6334a(11) =2358a(12) =13766a(13) =29096a(14) =26976a(15) =9735a(16) =50294a(17) =100963a(18) =89428a(19) =29011a(20) =149198a(21) =283043a(22) =237216a(23) =75948a(24) =368044a(25) =680922a(26) =557638a(27) =169158a(28) =816740a(29) =1464838
External references
- oeis: A201446