125292

Appears in sequences

• Triangle T(n,k) defined by Sum_{k=1..n} T(n,k)*u^k*t^n/n! = ((1+t)*(1+t^2)*(1+t^3)...)^u.at n=29A075525
• 2nd hyperbinomial transform of A001858.at n=6A089462
• Square array A(n,m), n>=0, m>=0, read by antidiagonals: A(n,m) = n-th number of the m-th iteration of the hyperbinomial transform on sequence A001858.at n=42A144304
• Numbers k such that R_(k+2) + 8*10^k is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=10A256934
• a(n) = (n!/2) * Sum_{k=1..n-1} A000593(k)*A000593(n-k)/(k*(n-k)).at n=7A338787