Number of (1+1)X(n+1) 0..3 arrays x(i,j) with row sums sum{j*x(i,j), j=1..n+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..1+1} nondecreasing.
A233056
Number of (1+1)X(n+1) 0..3 arrays x(i,j) with row sums sum{j*x(i,j), j=1..n+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..1+1} nondecreasing.
Terms
- a(0) =84a(1) =517a(2) =2504a(3) =10259a(4) =36681a(5) =117336a(6) =342631a(7) =926325a(8) =2343595a(9) =5598526a(10) =12716726a(11) =27621995a(12) =57655180a(13) =116108839a(14) =226372400a(15) =428556841a(16) =789816850a(17) =1420177257a(18) =2496385282a(19) =4297171239a(20) =7254711157a(21) =12028735960a(22) =19611652708a(23) =31476118410
External references
- oeis: A233056