982800

Appears in sequences

• Irrational unitary phi amicable number: numbers b such that uphi(a) = uphi(b) = 2*(a^2-b^2)^(1/2) where uphi = A047994.at n=1A046709
• One half of A075178.at n=23A075179
• Binet's factorial series. Denominators of the coefficients of a convergent series for the logarithm of the Gamma function.at n=24A122253
• Triangle T(n, k, m) = f(n, m)/(f(k, m)*f(n-k, m)), where T(0, k, m) = 1, f(n, k) = Product_{j=1..n} ( j!*((k+1)^j -1)/k ), f(n, 0) = n!, and m = 3, read by rows.at n=22A156767
• Triangle T(n, k, m) = f(n, m)/(f(k, m)*f(n-k, m)), where T(0, k, m) = 1, f(n, k) = Product_{j=1..n} ( j!*((k+1)^j -1)/k ), f(n, 0) = n!, and m = 3, read by rows.at n=26A156767
• Least number k such that sigma(k) >= 2^n.at n=21A172516
• a(n) is the least number such that there are n semiprimes pq such that (p+1)(q+1) = a(n) for each semiprime.at n=19A180334
• a(0) = a(1) = 1, a(n) = n! / a(n-2).at n=14A214916
• Table (read by rows) of all k-digit positive integers (in ascending order) with maximum number of divisors A066150(k).at n=15A240544
• Largely composite numbers that are not highly composite.at n=63A244353
• a(n) = 10*binomial(n+4, 5).at n=24A266732
• Ramanujan's largely composite numbers n (A067128) which are not divisible by all the primes < p, where p is the greatest prime divisor of n.at n=26A273379
• Highly composite numbers of class 3 (see comment in A275239).at n=31A275241
• Denominators of r(n) := Sum_{k=0..n-1} 1/Product_{j=0..4} (k + j + 1), for n >= 0, with r(0) = 0.at n=24A300299
• Number of minimum total dominating sets in the n X n black bishop graph.at n=15A303141
• Number of minimum total dominating sets in the n X n white bishop graph.at n=14A303144
• Triangle read by rows: T(n,m) is the number of length n decorated permutations avoiding the word 0^m = 0...0 of m 0's, where 1 <= m <= n.at n=40A334156
• a(n) = n! * [x^n] -exp(x^2)/(x - 1).at n=9A355268
• Indices of records in A362451.at n=11A362457
• Numbers k where records occur for d(k)/d(k+1), where d(k) is the number of divisors of k (A000005).at n=30A372092