75895domain: NAppears in sequencesNumber of (n+1) X 6 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.at n=14A204648a(n) = (42^n - 1)/41.at n=4A218745Expansion of Product_{k>=1} 1 / (1 - 6^(k-1)*x^k).at n=7A338675