Number of nX4 arrays of the minimum value of corresponding elements and their horizontal or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 nX4 array.
A220149
Number of nX4 arrays of the minimum value of corresponding elements and their horizontal or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 nX4 array.
Terms
- a(0) =10a(1) =50a(2) =254a(3) =1174a(4) =5410a(5) =24684a(6) =108169a(7) =448881a(8) =1761976a(9) =6564622a(10) =23314449a(11) =79243936a(12) =258638752a(13) =812875058a(14) =2465906695a(15) =7234818015a(16) =20565976895a(17) =56733702403a(18) =152106586332a(19) =396892051129
External references
- oeis: A220149