T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with 2 X 2 subblock sum of squares lexicographically nondecreasing rowwise and nonincreasing columnwise.
A235521
T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with 2 X 2 subblock sum of squares lexicographically nondecreasing rowwise and nonincreasing columnwise.
Terms
- a(0) =256a(1) =2272a(2) =2272a(3) =20164a(4) =61080a(5) =20164a(6) =131208a(7) =1693053a(8) =1649707a(9) =131208a(10) =853776a(11) =33809449a(12) =136233789a(13) =32516127a(14) =853776a(15) =4548852a(16) =677462696a(17) =8689553076a(18) =8849747316a(19) =636820654a(20) =4548852a(21) =24235929a(22) =10650729023a(23) =540301382239
External references
- oeis: A235521