1682928domain: NAppears in sequencesAlkane (or paraffin) numbers l(10,n).at n=25A018211Number of reversible strings with n-1 beads of 2 colors. 7 beads are black. String is not palindromic.at n=24A032094Number of n-element subsets of [n+7] having an even sum.at n=25A282083