221069

Properties

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 72.at n=4A031660
• Primes p such that the differences between the 5 consecutive primes starting with p are (2,6,6,4).at n=13A078950
• Primes p such that (5*p+2)/3 is the square of a prime.at n=24A357199
• Prime numbersat n=19700