186615
domain: N
Appears in sequences
- The smaller of a betrothed pair.at n=9A003502
- Betrothed (or quasi-amicable) numbers.at n=18A005276
- Numbers k such that sigma(k) = sigma(k+3).at n=8A015861
- a(n) = T(2n,n), where T is the array defined in A025177.at n=8A025184
- a(n) = T(n,[ n/2 ]), where T is the array defined in A025177.at n=16A025189
- Quasi-amicable pairs.at n=18A328370