47775

Appears in sequences

• a(n) = n*(n+1)^2*(n+2)^2/12.at n=13A004282
• a(n) = floor(n/2) * floor((n-1)/2) * floor((n-2)/2) * floor((n-3)/2) * floor((n-4)/2) / 12.at n=31A028725
• Coefficients of a special case of Poisson-Charlier polynomials.at n=49A046716
• Triangle read by rows: T(n,k) are the coefficients of Charlier polynomials: A046716 transposed, for 0 <= k <= n.at n=50A094816
• Positive integers n such that n^2 = (x^4 - y^4)*(z^4 - t^4) where the pairs of integers (x,y) and (z,t) are not proportional.at n=32A147854
• Number of strings of numbers x(i=1..5) in 0..n with sum i*x(i) equal to n*5.at n=24A184705
• Numbers for which the number of prime divisors counted with multiplicity and the sum of the distinct prime divisors are both perfect.at n=22A233563
• Triangle T read by rows: T(n,k) = binomial(2*n+1,k)*binomial(n,k), n>=0, 0<=k<=n.at n=32A252501
• Numbers k such that {k + 2, k + 4} and {k^2 + 2, k^2 + 4} are both twin prime pairs.at n=22A284014
• Fifth diagonal sequence of the Sheffer triangle A094816 (special Charlier).at n=5A290314
• a(n) is the number of subsets of {1..n} that contain exactly 2 odd and 3 even numbers.at n=30A330300
• Numbers m such that m^2 + p^2 = k^2, with p > 0, where p = A007954(m) = the product of digits of m.at n=11A334558
• Triangle T(n,m) = C(2*m-1,m)*C(n+2*m-1,n-m).at n=40A338037
• Odd numbers k such that A162296(k) > 2*k.at n=29A357607