Number of (n+1)X(1+1) 0..1 arrays x(i,j) with row sums sum{x(i,j), j=1..1+1} nondecreasing, and column sums sum{i*x(i,j), i=1..n+1} nondecreasing.

A233058

Number of (n+1)X(1+1) 0..1 arrays x(i,j) with row sums sum{x(i,j), j=1..1+1} nondecreasing, and column sums sum{i*x(i,j), i=1..n+1} nondecreasing.

Terms

    a(0) =7a(1) =16a(2) =33a(3) =66a(4) =132a(5) =265a(6) =530a(7) =1052a(8) =2092a(9) =4183a(10) =8354a(11) =16635a(12) =33179a(13) =66383a(14) =132711a(15) =264751a(16) =528676a(17) =1057904a(18) =2115653a(19) =4224206a(20) =8439821a(21) =16888361a(22) =33778253a(23) =67474289a(24) =134850638a(25) =269827760a(26) =539703540a(27) =1078399254a(28) =2155614282a(29) =4313028554

External references