Number of nX2 0..4 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.
A200984
Number of nX2 0..4 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) =10a(1) =10a(2) =20a(3) =79a(4) =21a(5) =226a(6) =157a(7) =227a(8) =678a(9) =120a(10) =1272a(11) =789a(12) =1015a(13) =2697a(14) =404a(15) =4232a(16) =2484a(17) =3008a(18) =7496a(19) =1025a(20) =10650a(21) =6050a(22) =7060a(23) =16895a(24) =2181a(25) =22530a(26) =12525a(27) =14255a(28) =33174a(29) =4116
External references
- oeis: A200984