T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with 2X2 subblock sum of squares lexicographically nondecreasing rowwise and nonincreasing columnwise.
A235421
T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with 2X2 subblock sum of squares lexicographically nondecreasing rowwise and nonincreasing columnwise.
Terms
- a(0) =81a(1) =432a(2) =432a(3) =2304a(4) =5022a(5) =2304a(6) =9504a(7) =60879a(8) =60231a(9) =9504a(10) =39204a(11) =543946a(12) =1607343a(13) =533868a(14) =39204a(15) =138402a(16) =4895505a(17) =33361964a(18) =33411901a(19) =4740889a(20) =138402a(21) =488601a(22) =35230388a(23) =681329430a(24) =1782209164a(25) =692896087a(26) =33788761a(27) =488601a(28) =1553877
External references
- oeis: A235421