4173840domain: NAppears in sequencesAlkane (or paraffin) numbers l(10,n).at n=29A018211Number of reversible strings with n-1 beads of 2 colors. 7 beads are black. String is not palindromic.at n=28A032094a(n) = n*(n+1)*(n+2)*(n+3)*(n+4)/8.at n=30A151974Number of n-element subsets of [n+7] having an even sum.at n=29A282083