Number of (n+1)X6 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.
A203725
Number of (n+1)X6 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) =2278a(1) =12470a(2) =58048a(3) =230014a(4) =808455a(5) =2572189a(6) =7508980a(7) =20395251a(8) =51998196a(9) =125414516a(10) =287825519a(11) =631806642a(12) =1332124235a(13) =2708040628a(14) =5324902859a(15) =10157044643a(16) =18841255222a(17) =34065603378a(18) =60151407191a(19) =103913751089
External references
- oeis: A203725