21360240

Appears in sequences

• Expansion of (1-4*x)^(11/2).at n=23A020923
• a(n) is the smallest entry of the n-th column of the matrix of Super Catalan numbers S(m,n).at n=17A173781
• Numbers n such that there exists an x!=n that makes {n,n,n,x} an amicable multiset.at n=14A259304