Number of (n+1)X(3+1) 0..3 arrays with 2X2 subblock sum of squares lexicographically nondecreasing rowwise and nonincreasing columnwise.
A235520
Number of (n+1)X(3+1) 0..3 arrays with 2X2 subblock sum of squares lexicographically nondecreasing rowwise and nonincreasing columnwise.
Terms
- a(0) =20164a(1) =1693053a(2) =136233789a(3) =8849747316a(4) =569055271070
External references
- oeis: A235520