Number of (n+1)X(2+1) 0..1 arrays x(i,j) with row sums sum{j*x(i,j), j=1..2+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing.
A233361
Number of (n+1)X(2+1) 0..1 arrays x(i,j) with row sums sum{j*x(i,j), j=1..2+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..n+1} nondecreasing.
Terms
- a(0) =14a(1) =46a(2) =139a(3) =364a(4) =849a(5) =1928a(6) =4281a(7) =9315a(8) =19741a(9) =40967a(10) =84289a(11) =172238a(12) =349179a(13) =700980a(14) =1406113a(15) =2817168a(16) =5640787a(17) =11280975a(18) =22553200a(19) =45097300a(20) =90149110a(21) =180171641a(22) =360001235a(23) =719290309a(24) =1437274041a(25) =2870143830a(26) =5726092077a(27) =11425527566
External references
- oeis: A233361