Numbers k such that k | (sigma(k-2) + sigma(k-1) + sigma(k+1) + sigma(k+2)).

A296027

Numbers k such that k | (sigma(k-2) + sigma(k-1) + sigma(k+1) + sigma(k+2)).

Terms

    a(0) =6a(1) =57a(2) =443a(3) =1407a(4) =1410a(5) =12242a(6) =15051a(7) =30952a(8) =44277a(9) =65190a(10) =68697a(11) =609531a(12) =921774a(13) =951092a(14) =2012670a(15) =2820460a(16) =11961680a(17) =32886944a(18) =3450005970

External references