51840000

Appears in sequences

• Squares of even pentagonal pyramidal numbers.at n=18A014800
• Square array T(n,k) read by antidiagonals: denominators of Stirling numbers of first kind with negative argument S1(-n,k), n,k>=0.at n=48A103880
• Denominator of x(n) = Sum_{k=1..n} ((odd part of k)/(k^5)).at n=4A111923
• Number of permutations of {1,2,...,n} having no consecutive triples of the form (odd, even, odd) or (even, odd, even).at n=12A152876
• Denominators of poly-Cauchy numbers c_n^(5).at n=5A224100
• Positions of records in A050377, number of ways to factor n into "Fermi-Dirac primes" (A050376).at n=27A330687
• Squares k such that phi(k) is a cube.at n=22A358051
• Number of permutations p of [n] such that each element in p has at least one neighbor with opposite parity.at n=12A363236
• Triangle of denominators for rational convergents to Taylor series of Gamma(x+1).at n=17A386679
• Powers k^m, m > 1, where k is an Achilles number whose squarefree kernel is a primorial.at n=22A389226
• Powers k^m, m > 1, where k is an Achilles number that is a product of primorials.at n=14A389260