Numbers k such that k concatenated with k+1 gives the product of two numbers which differ by 1.
A116163
Numbers k such that k concatenated with k+1 gives the product of two numbers which differ by 1.
Terms
- a(0) =1a(1) =5a(2) =61a(3) =65479a(4) =84289a(5) =106609a(6) =225649a(7) =275599a(8) =453589a(9) =1869505a(10) =2272555a(11) =2738291a(12) =3221951a(13) =1667833021a(14) =2475062749a(15) =2525062249a(16) =3500010739a(17) =9032526511a(18) =9225507211
External references
- oeis: A116163