Number of (n+1) X 4 0..1 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.
A204646
Number of (n+1) X 4 0..1 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) =28a(1) =56a(2) =104a(3) =178a(4) =284a(5) =434a(6) =637a(7) =908a(8) =1259a(9) =1708a(10) =2270a(11) =2966a(12) =3814a(13) =4838a(14) =6059a(15) =7504a(16) =9197a(17) =11168a(18) =13444a(19) =16058a(20) =19040a(21) =22426a(22) =26249a(23) =30548a(24) =35359a(25) =40724a(26) =46682a(27) =53278a(28) =60554a(29) =68558
External references
- oeis: A204646