691200

Appears in sequences

• Multiply successively by 1 (once), 2 (twice), 3 (thrice), etc.at n=12A010552
• Expansion of e.g.f.: exp(arctan(x)-arctanh(x))=1-4/3!*x^3+160/6!*x^6-1440/7!*x^7...at n=10A013462
• sec(arctan(x)-arctanh(x))=1+160/6!*x^6+691200/10!*x^10+19712000/12!*x^12...at n=5A013466
• Product of digits of 2^n.at n=28A014257
• Let sigma_m (n) be result of applying sum-of-divisors function m times to n; call n (m,k)-perfect if sigma_m (n) = k*n; sequence gives the (2,9)-perfect numbers.at n=3A019286
• Denominators of coefficients in Taylor series for exp(tan(x)).at n=12A047692
• Number of 3-fold-free subsets of {1, 2, ..., n}.at n=22A050293
• a(n) = (1/2) * (number of n X n 0..9 matrices with MM' mod 10 = I).at n=3A071308
• a(1) = 3 then a(n) = smallest multiple of a(n-1) > a(n-1) such that a(n) - 1 is a prime.at n=11A084717
• Hook products of all partitions of 13.at n=23A093792
• Hook products of all partitions of 13.at n=24A093792
• Greatest common divisor of multiperfect numbers and their totient.at n=21A098204
• Inverse modulo 2 binomial transform of 7^n.at n=7A100740
• a(1) = 10, a(n) = a(n-1) times the number of digits in a(n-1).at n=10A110804
• Number of divisors of A138113(n).at n=25A140410
• Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} with k parity changes (n>=2; 1<=k <=n-1); the permutation 372185946 has 5 parity changes: 37-2-1-8-59-46.at n=39A152874
• Triangle read by rows: T(n,k) is the number of permutations of {1,2,...,n} with k parity changes (n>=2; 1<=k <=n-1); the permutation 372185946 has 5 parity changes: 37-2-1-8-59-46.at n=41A152874
• The number of sets of n positive integers strictly less than 2*n such that no integer in the set divides another.at n=48A192298
• Triangle T(n,k) of ways n couples can sit in a row with exactly k of them together.at n=26A193639
• Sorted number of edges of distinct solutions in the mix of 2 or 3 regular convex 4-polytopes.at n=15A199808