99090432domain: NAppears in sequencesTriangle whose (i,j)-th entry is binomial(i,j)*8^(i-j)*12^j.at n=30A038290Number of plane binary trees of size n+3 and contracted height n.at n=19A074092For n > 2 , a(n) = a(n-2) + lcm(a(n-2), n-1) with a(1)=2, a(2)=2.at n=26A217662