Number of positive integers with n digits that are the product of two integers ending with 7.
A348055
Number of positive integers with n digits that are the product of two integers ending with 7.
Terms
- a(0) =0a(1) =1a(2) =20a(3) =255a(4) =3064a(5) =34743a(6) =380939a(7) =4089499a(8) =43282317a(9) =453472867a(10) =4715695283a(11) =48760330737a(12) =501941505404
External references
- oeis: A348055