Number of (3+1) X (n+1) 0..3 arrays with 2 X 2 subblock sum of squares lexicographically nondecreasing rowwise and nonincreasing columnwise.
A235523
Number of (3+1) X (n+1) 0..3 arrays with 2 X 2 subblock sum of squares lexicographically nondecreasing rowwise and nonincreasing columnwise.
Terms
- a(0) =20164a(1) =1649707a(2) =136233789a(3) =8689553076a(4) =540301382239
External references
- oeis: A235523