211249

Appears in sequences

• Numerators of continued fraction convergents to sqrt(326).at n=3A041614
• Initial terms of chains consisting of four consecutive integers, for none of which is the value of sigma-function divisible by six.at n=16A097020
• Let a,b be prime numbers satisfying the Diophantine equation a^3+b^3=(a+b)*(a^2-a*b+b^2)=c^2. Then the second factor a^2-a*b+b^2 is 3*e^2 for some integer e. This sequence tabulates the 'e' values, sorted by magnitude of c.at n=10A099809
• a(n) = 648*n^2 + 72*n + 1.at n=17A154515
• a(n) = 13122*n^2 + 324*n + 1.at n=3A157506
• Numbers that are the sum of four fourth powers in three or more ways.at n=28A344241
• Numbers that are the sum of four fourth powers in exactly three ways.at n=28A344242