147492

Appears in sequences

• Numbers n such that phi(n) + sigma(n) = 3n.at n=5A011251
• Nonprimes k that divide sigma(k) + phi(k).at n=8A011774
• Numbers k such that if you subtract k from its reversal you get a positive number with the same digits as k.at n=32A121970
• Number of (n+1) X (2+1) 0..1 arrays with every 2 X 2 subblock diagonal minus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.at n=14A253429
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-2) + 2, where a(0) = 1, a(1) = 2, b(0) = 3.at n=21A294534