1828915200

Appears in sequences

• Product of the nonzero digital products of all the numbers 1 to n (a 'total digital-product factorial' in base 10).at n=16A131451
• Number of permutations of {1,2,...,n} (n>=2) having a single run of even entries. For example, the permutation 513284679 has a single run of even entries: 2846.at n=13A152873
• a(n) = (n-1)! * (n+1)!.at n=7A175430
• Number of length n mixed-radix numbers with base [2, 3, 4, ...] (factorial base) such that the parities of adjacent digits differ.at n=15A219024
• Number of permutations of {1,2,3,...,n} such that no multiples of 3 are adjacent.at n=13A258216
• a(n) = denominator((1/n!)*Sum_{k=1..n} 1/(2*k)).at n=9A377401