17297280

Appears in sequences

• Quadruple factorial numbers: a(n) = (2n)!/n!.at n=7A001813
• Quadruple factorial numbers n!!!!: a(n) = n*a(n-4).at n=26A007662
• a(1)=1; for n > 1, a(n) is the smallest number with the same number of divisors as 2*a(n-1).at n=27A019505
• Number of permutations p of {1,2,3...,n} that are fixed points under the operation of first reversing p, then taking the inverse.at n=27A037224
• Number of permutations p of {1,2,3...,n} that are fixed points under the operation of first reversing p, then taking the inverse.at n=28A037224
• Smallest number with 2^n divisors.at n=9A037992
• Triangle read by rows. A generalization of unsigned Lah numbers, called L[4,1].at n=28A048854
• a(n) = (n+7)!/7!.at n=7A049388
• Numbers having more than one representation as the product of consecutive integers > 1.at n=5A064224
• Smallest number with exactly A025475(n) divisors.at n=20A065743
• a(1) = 1; a(n) = n*a(n-1) if n does not divide a(n-1), otherwise a(n) = a(n-1).at n=15A066616
• Square array read by descending antidiagonals of number of ways of dividing n*k labeled items into k unlabeled orders with n items in each order.at n=29A066991
• Least highly composite number whose prime decomposition starts with 2^n.at n=7A068506
• a(1) = 1, a(n) = a(n-1) times smallest prime factor of n.at n=14A072486
• Highly composite numbers k such that 2*k is not a highly composite number.at n=17A073771
• Smallest product (n+1)(n+2)...(n+k) that is divisible by the product of all the primes up to n.at n=6A075366
• a(n) = n! / floor(n/2)!.at n=14A081125
• Smallest product (n+1)(n+2)...(n+k) which is a multiple of n, where n+k is given by A061243.at n=6A081470
• a(n) is n! times the coefficient of Pi^floor(n/2) in the volume of an n-dimensional unit ball.at n=14A094941
• Least product n*(n-1)*(n-2)*...*(n-k+1) divisible by (n-k)!.at n=13A096123