570240

Appears in sequences

• Expansion of e.g.f. (1-2*x)/(1-4*x+2*x^2).at n=6A052680
• a(1) = 1. For n>1, the smallest number greater than n! with the prime signature of n!.at n=8A088300
• a(n) = (2*n+2)!/((n+2)*n!).at n=5A092956
• Numbers n such that n=phi(phi(n)+sigma(n)) and n is not of the form 2*p where p is a Sophie Germain odd prime.at n=16A097652
• Greatest common divisor of multiperfect numbers and their totient.at n=19A098204
• Magic products of 5 X 5 multiplicative magic squares.at n=19A111031
• The following triangle contains n smallest numbers with the prime signature of n!. Sequence contains the triangle by rows.at n=37A111467
• a(n) = number of elements of order n in simple group Alt(12) of order 239500800.at n=6A145437
• Number of degree-n permutations of order exactly 7.at n=11A153760
• Triangle read by rows, T(n,k) = C(2*n,n+k)*Sum_{m=0..k} (-1)^(m+k)*C(n+k,n+m)* Stirling1(n+m,m), for n>=0 and 0<=k<=n.at n=22A268440
• Denominator of cumulative weight of certain D-forests on n nodes.at n=11A301737