Number of n X n 0..2 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.
A201270
Number of n X n 0..2 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) =1a(1) =3a(2) =5a(3) =7a(4) =85a(5) =556a(6) =1260a(7) =27008a(8) =215577a(9) =613916a(10) =16442049a(11) =152673459a(12) =487975060a(13) =14392411292a(14) =144918917509a(15) =496264541787
External references
- oeis: A201270