81223

Properties

Appears in sequences

• a(1)= 3, a(n) = least prime obtained by prefixing the digits of a multiple of n to a(n-1).at n=3A088056
• Numbers k such that (3^k + 4^k)/7 is prime.at n=14A128066
• Primes p such that p+2 is the square of a product of 3 distinct primes.at n=2A164519
• Primes of the form 9n^2 - 2.at n=19A201860
• Number of Carlitz compositions of n with parts in standard order.at n=29A383751
• Prime numbersat n=7950