56757583872domain: NAppears in sequencesSecond column of triangle A055864.at n=10A055865a(1) = 1; for n >= 2, a(n) = (n*(n+1)^(n-1))/(n+1).at n=10A085389Expansion of g.f. (1-x)/(1-12*x).at n=10A196731a(n) = n^10 - n^9.at n=12A240933