Numbers k such that sigma(k) + sigma(k+1) = 4k.
A068077
Numbers k such that sigma(k) + sigma(k+1) = 4k.
Terms
- a(0) =1a(1) =38184a(2) =458010a(3) =776112a(4) =65676408a(5) =1488668112a(6) =4414086384a(7) =28645019964a(8) =46696401675a(9) =65466785748a(10) =70619381496a(11) =176151711072
External references
- oeis: A068077