1220940domain: NAppears in sequencesa(n) = 3*(n+1)*binomial(n+5,6).at n=13A027811The denominators of Zagier's modification of the Bernoulli numbers.at n=17A216923Numbers n such that there exists an x!=n that makes {x,x,x,n} an amicable multiset.at n=1A259305a(n) = Pochhammer(n, 5) / 2.at n=17A293615