69526

Appears in sequences

• Expansion of 1/(x^k*(1-x-3*x^(k+1))) for k=7.at n=33A143458
• Expansion of ( -1-2*x+x^2+x^3 ) / (x^2+x-1)^3 .at n=14A261055
• a(n) = Sum_{k=1..floor(n/2)} sigma_k(n-k), where sigma_k(n) is the sum of the k-th powers of the divisors of n.at n=11A343781