Number of (n+1)X(2+1) 0..3 arrays with 2X2 subblock sums lexicographically nondecreasing rowwise and nonincreasing columnwise.
A235414
Number of (n+1)X(2+1) 0..3 arrays with 2X2 subblock sums lexicographically nondecreasing rowwise and nonincreasing columnwise.
Terms
- a(0) =2400a(1) =64848a(2) =1826923a(3) =37684700a(4) =782294899a(5) =12863400296a(6) =211918008383
External references
- oeis: A235414