Number of (4+1) X (n+1) 0..1 arrays x(i,j) with row sums sum{x(i,j), j=1..n+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..4+1} nondecreasing.
A233304
Number of (4+1) X (n+1) 0..1 arrays x(i,j) with row sums sum{x(i,j), j=1..n+1} nondecreasing, and column sums sum{i^2*x(i,j), i=1..4+1} nondecreasing.
Terms
- a(0) =64a(1) =502a(2) =3556a(3) =21957a(4) =122022a(5) =616439a(6) =2871477a(7) =12451710a(8) =50714574a(9) =195371008a(10) =716295219a(11) =2512238327a(12) =8466906587a(13) =27527291020a(14) =86628418167a(15) =264674530948a(16) =787179022872
External references
- oeis: A233304