300833

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 47.at n=13A031635
• Counts of Kekulean pericondensed planar benzenoid hydrocarbons (see reference for precise definition).at n=8A141787
• Numbers that are the sum of three biquadrates (fourth powers) in more than one way.at n=18A193244
• Numbers that are the sum of 3 nonzero 4th powers in more than one way.at n=28A309762
• Terms of A324315 (squarefree integers m > 1 such that if prime p divides m, then the sum of the base p digits of m is at least p) that are also octagonal numbers (A000567) with index equal to their largest prime factor.at n=14A324320
• Numbers that are the sum of three fourth powers in exactly two ways.at n=28A344192