Number of (2+1)X(n+1) 0..3 arrays with 2X2 subblock sum of squares lexicographically nondecreasing rowwise and nonincreasing columnwise.
A235522
Number of (2+1)X(n+1) 0..3 arrays with 2X2 subblock sum of squares lexicographically nondecreasing rowwise and nonincreasing columnwise.
Terms
- a(0) =2272a(1) =61080a(2) =1693053a(3) =33809449a(4) =677462696a(5) =10650729023a(6) =168095526255
External references
- oeis: A235522