32335

Appears in sequences

• Numbers k such that phi(k) + phi(k+1) = sigma(k).at n=13A067799
• Eigenvector of triangle A118919, so that a(n) = Sum_{k=0..floor(n/2)} A118919(n,k)*a(k).at n=8A119243
• Numbers k with d digits such that all digits of k and the last d+1 digits of k^2 are prime.at n=7A154780
• Numbers m such that m divides A173290(m) = Sum_{k=1..m} psi(k), where psi is the Dedekind psi function (A001615).at n=13A309272
• a(n) = n*(n + 1)*(n^2 + n + 22)/24.at n=29A318054
• Numbers m such that sigma(m) = tau(m)! where sigma(k) = A000203(k) and tau(k) = A000005(k).at n=20A351866
• a(1) = a(2) = 1; a(n) = gcd(a(n-1), a(n-2)) + (a(n-1) + a(n-2))/gcd(a(n-1), a(n-2)).at n=26A355898
• Number of partitions of [n] such that no block contains its size as an element.at n=10A363881