384704

Appears in sequences

• Triangle, read by rows, where T(n,k) = T(n,k-1) + n*T(n-1,k-1) for n>0 and k>0, with T(n,0) = T(n-1,n-1) for n>0 and T(0,0) = 1.at n=32A132007
• a(n) = Sum_{k=0..n} binomial(n,2k)*A002426(k).at n=15A162533
• Numbers n such that n^2 + 3, n^3 + 3, n^4 + 3, n^5 + 3, n^6 + 3 and n^7 + 3 are semiprime.at n=26A253907
• a(n) = Sum_{k=0..floor(n/3)} 2^k * binomial(2*k,2*n-6*k).at n=24A387763