Number of (n+1) X 4 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.
A203723
Number of (n+1) X 4 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) =326a(1) =1632a(2) =6249a(3) =20290a(4) =58048a(5) =151649a(6) =367595a(7) =839916a(8) =1825184a(9) =3804580a(10) =7650824a(11) =14922063a(12) =28339038a(13) =52596875a(14) =95678477a(15) =171041225a(16) =301149679a(17) =523280917a(18) =898900092a(19) =1528951772a(20) =2578559796a(21) =4317146589a(22) =7183260955a(23) =11889652446a(24) =19593122042a(25) =32169536858a(26) =52658524612
External references
- oeis: A203723