103127

Appears in sequences

• Concatenation of n-th prime number and n-th lucky number.at n=26A032603
• Semiprimes which are products of two primes each with half the number of digits, and which when split in the middle gives two primes; no leading zeros.at n=26A243749
• Numbers k such that (16*10^k + 77)/3 is prime.at n=23A285633
• a(n) is the number of integer quintuples (a,b,c,d,e) satisfying a system of linear inequalities and congruences specified in the comments.at n=9A384127