T(n,k)=Number of nXk arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..3 nXk array.
A220931
T(n,k)=Number of nXk arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and columns, 0..3 nXk array.
Terms
- a(0) =4a(1) =4a(2) =4a(3) =10a(4) =13a(5) =10a(6) =20a(7) =41a(8) =41a(9) =20a(10) =35a(11) =114a(12) =283a(13) =114a(14) =35a(15) =56a(16) =260a(17) =1448a(18) =1448a(19) =260a(20) =56a(21) =84a(22) =545a(23) =6687a(24) =15360a(25) =6687a(26) =545a(27) =84a(28) =120a(29) =1104
External references
- oeis: A220931