a(n) is the least number k such that sigma(k+n) = Sum_{j=1..i} sigma(d_j), where d_j are the divisors of k.
A291882
a(n) is the least number k such that sigma(k+n) = Sum_{j=1..i} sigma(d_j), where d_j are the divisors of k.
Terms
- a(0) =1a(1) =2a(2) =10a(3) =1183a(4) =4514a(5) =1179a(6) =38a(7) =3325a(8) =9a(9) =126855a(10) =290a(11) =261a(12) =18a(13) =6a(14) =1930a(15) =104771947a(16) =344a(17) =58a(18) =326a(19) =117a(20) =270754a(21) =13875a(22) =32a(23) =45a(24) =32a(25) =74a(26) =70a(27) =38a(28) =18a(29) =21200761175
External references
- oeis: A291882