Numbers k such that k concatenated with itself gives the product of two numbers which differ by 1.

A116154

Numbers k such that k concatenated with itself gives the product of two numbers which differ by 1.

Terms

    a(0) =132a(1) =406a(2) =510a(3) =852a(4) =7930a(5) =66942a(6) =113322a(7) =440056a(8) =5289256a(9) =58477510a(10) =111333222a(11) =164378892a(12) =183673470a(13) =200444410a(14) =206611570a(15) =224376732a(16) =277008310a(17) =297520662a(18) =305024040a(19) =326530612a(20) =353505556a(21) =444000556a(22) =479289942

External references