Number of (n+1) X 2 0..2 arrays with column and row pair sums b(i,j)=a(i,j)+a(i,j-1) and c(i,j)=a(i,j)+a(i-1,j) nondecreasing in column and row directions, respectively.
A203721
Number of (n+1) X 2 0..2 arrays with column and row pair sums b(i,j)=a(i,j)+a(i,j-1) and c(i,j)=a(i,j)+a(i-1,j) nondecreasing in column and row directions, respectively.
Terms
- a(0) =32a(1) =113a(2) =326a(3) =888a(4) =2278a(5) =5653a(6) =13665a(7) =32440a(8) =75965a(9) =176104a(10) =405154a(11) =926794a(12) =2110867a(13) =4791921a(14) =10851104a(15) =24525361a(16) =55351946a(17) =124789380a(18) =281102434a(19) =632821501a(20) =1423947009a(21) =3202968748a(22) =7202709761a(23) =16193929296a(24) =36403520114a(25) =81824939598
External references
- oeis: A203721