Numbers n whose symmetric representation of sigma(n) has a maximum width of 2 that occurs exactly once (at the diagonal).

A338488

Numbers n whose symmetric representation of sigma(n) has a maximum width of 2 that occurs exactly once (at the diagonal).

Terms

    a(0) =6a(1) =15a(2) =28a(3) =91a(4) =153a(5) =190a(6) =325a(7) =496a(8) =703a(9) =861a(10) =946a(11) =1431a(12) =1891a(13) =2278a(14) =2701a(15) =3655a(16) =4753a(17) =5151a(18) =5356a(19) =5995a(20) =6441a(21) =7381a(22) =8128a(23) =8911a(24) =9453a(25) =10585a(26) =11476a(27) =12403a(28) =13366a(29) =15051

External references