Number of nX3 arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 nX3 array.
A219847
Number of nX3 arrays of the minimum value of corresponding elements and their horizontal or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 nX3 array.
Terms
- a(0) =6a(1) =17a(2) =65a(3) =225a(4) =669a(5) =1815a(6) =4617a(7) =11125a(8) =25523a(9) =55964a(10) =117681a(11) =238066a(12) =464687a(13) =877568a(14) =1607502a(15) =2862716a(16) =4966875a(17) =8412215a(18) =13932550a(19) =22602023a(20) =35966785a(21) =56218309a(22) =86418799a(23) =130791159a(24) =195088267a(25) =287058878a(26) =417030383a(27) =598631904a(28) =849684835
External references
- oeis: A219847