6451200

Appears in sequences

• Expansion of (1+2x)/(1-2x)^4 (E.g.f.).at n=6A014484
• Triangle T(n,k) of number of minimal 3-covers of a labeled n-set that cover k points of that set uniquely (k=3,..,n).at n=30A057964
• Least number whose number of divisors is n-th term from A014613 (numbers of form p*q*r*s, products of exactly 4 primes, counted with multiplicity).at n=31A061218
• Where records occur in A222084.at n=37A222089
• Number of odd divisors of n!.at n=42A336940