221021

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 85.at n=6A031673
• Smallest prime which occurs exactly n times in the sequence A086527.at n=37A086528
• Smallest prime p such that the multiplicative order of 8 modulo p is n, or 0 if no such prime exists.at n=42A372798
• Prime numbersat n=19697