78183

Appears in sequences

• Numbers k such that phi(k) = phi(k-2) - phi(k-1).at n=5A066232
• Nonsquarefree numbers n such that phi(n) = phi(n-2)-phi(n-1), where phi is Euler's totient function.at n=1A066359
• Triangle read by rows: T(n, k) = (n-k)^n - n*k*(n-k) + k^n, with T(0, 0) = 1.at n=30A129821
• Triangle read by rows: T(n, k) = (n-k)^n - n*k*(n-k) + k^n, with T(0, 0) = 1.at n=33A129821
• Third diagonal sequence of the Sheffer triangle A094816 (special Charlier).at n=26A290312