22947

Appears in sequences

• T(n,4), array T as in A054134.at n=8A054138
• Numbers n such that sigma(2*phi(n)) = 2*sigma(n).at n=13A137733
• Diagonal sums of number triangle A113582.at n=28A154324
• a(0) = ... = a(3) = 1; a(n) = a(n-4) + Sum_{k=0..n-5} a(k) * a(n-k-5).at n=28A343305
• a(1) = 1, a(2) = 2; for n >= 3, a(n) = (n-1)^3 - a(n-1) - a(n-2).at n=40A361134