Numbers k such that k concatenated with k-1 gives the product of two numbers which differ by 7.
A116152
Numbers k such that k concatenated with k-1 gives the product of two numbers which differ by 7.
Terms
- a(0) =9a(1) =11a(2) =45a(3) =18281a(4) =32769a(5) =56891a(6) =180689a(7) =330539a(8) =959481a(9) =1850201a(10) =3247409a(11) =4940219a(12) =2425563239a(13) =2575561739a(14) =6003563495a(15) =7245212645a(16) =7770160145
External references
- oeis: A116152