Integers m such that sigma_2(m) = sigma_2(m + 2) where sigma_2(m) is the sum of squares of divisors of m (A001157).

A169635

Integers m such that sigma_2(m) = sigma_2(m + 2) where sigma_2(m) is the sum of squares of divisors of m (A001157).

Terms

    a(0) =24a(1) =215a(2) =280a(3) =1079a(4) =947519a(5) =1362239a(6) =2230271a(7) =14939999a(8) =19720007a(9) =32509439a(10) =45581759a(11) =45841247a(12) =49436927a(13) =78436511a(14) =82842911a(15) =101014631a(16) =166828031a(17) =225622151a(18) =225757799a(19) =250999559a(20) =377129087a(21) =554998751a(22) =619606439a(23) =846765431a(24) =1204092287a(25) =1302170687a(26) =1710035711

External references