1042587

Appears in sequences

• Numbers k such that k and 2*k are anagrams.at n=15A023086
• Intersection of A065764 and A065765: n such that x and y exist with sigma[x^2] = n = sigma[2*(y^2)].at n=21A065767
• Seven-digit terms in A023086.at n=2A159816
• a(n) = sqrt(sigma(2*m^2)), where m = A097023(n), i.e., sigma(2*m^2) is a square.at n=21A163764
• a(n) = Sum_{k=0..floor(n/3)} binomial(n+k-1,k) * binomial(n-1,n-3*k).at n=14A389376