24024

Appears in sequences

• a(n) = (5*n+1)*(5*n+2)*(5*n+3)*(5*n+4).at n=2A001512
• 4th forward differences of factorial numbers A000142.at n=4A001688
• Squares written in base 5.at n=42A001740
• a(n) = LCM(1,2,...,n) / n.at n=14A002944
• Apéry numbers: n*C(2*n,n).at n=7A005430
• 4-dimensional Catalan numbers.at n=4A005790
• Ruth-Aaron numbers (1): sum of prime divisors of n = sum of prime divisors of n+1.at n=23A006145
• Triangle of coefficients of Legendre polynomials 2^n P_n (x).at n=21A008556
• Denominator of n * n-th harmonic number.at n=14A027611
• a(n) = 2*(n+1)*binomial(n+3,4).at n=10A027789
• a(n) = 22*(n+1)*binomial(n+3,12).at n=2A027797
• Number of standard permutations of [ a_1..a_n b_1..b_n ] (b_i is not immediately followed by a_i, for all i).at n=4A033815
• Number of n X n Young tableaux.at n=4A039622
• Distinct numbers in the triangle of denominators in Leibniz's Harmonic Triangle.at n=52A046202
• Distinct even numbers in the triangle of denominators in Leibniz's Harmonic Triangle.at n=42A046204
• Numbers to the right of the central elements in the triangle of denominators in Leibniz's Harmonic Triangle.at n=42A046207
• Denominator of Sum_{k=0..n} 1/binomial(n,k).at n=14A046826
• Triangular array formed from successive differences of factorial numbers.at n=40A047920
• a(n) = (n+10)!/10!.at n=4A051431
• There are exactly n integer-sided triangles of area a(n).at n=33A051586