26127360

Appears in sequences

• a(n) = n*(n-1)^3*(n-2)^3*(n-3).at n=10A064321
• Product of nonzero digits of A066553(n).at n=17A066584
• a(1) = 3, a(n) = smallest multiple of a(n-1) such that 10*a(n) + 1 is prime.at n=16A089325
• Permanent of the n X n (0,1)-matrices with ij-th entry equal to zero iff (i=1,j=1),(i=1,j=n),(i=n,j=1) and (i=n,j=n).at n=8A098916
• Product of the first n 3-almost primes (A014612).at n=5A114425
• Composite numbers such that Sum_{i=1..k} (1 + 1/p_i) - Product_{i=1..k} (1 + 1/p_i) is an integer, where p_i are the k prime factors of n (with multiplicity).at n=26A226365
• a(n) = n! a(n-1) / a(n-2), where a(0) = 1, a(1) = 2.at n=10A372994