129509

Properties

Appears in sequences

• Primes that are concatenations of k-th composite and k-th prime.at n=26A038532
• Triangle defined by g.f. A(x,y) = exp( Sum_{n>=1} x^n/n * Sum_{k=0..n} binomial(n, k)^(k+1) * y^k ), as read by rows.at n=25A228899
• Sophie Germain primes p whose corresponding safe prime is an anagram of p.at n=3A371623
• Prime numbersat n=12121