Triangle read by rows: T(n,k) is the number of n-digit numbers having a k-digit greatest prime factor.
A294952
Triangle read by rows: T(n,k) is the number of n-digit numbers having a k-digit greatest prime factor.
Terms
- a(0) =9a(1) =36a(2) =54a(3) =95a(4) =470a(5) =335a(6) =197a(7) =2854a(8) =3547a(9) =2402a(10) =356a(11) =13370a(12) =31999a(13) =25577a(14) =18698a(15) =579a(16) =54250a(17) =236147a(18) =256465a(19) =199403a(20) =153156a(21) =882a(22) =196729a(23) =1486448a(24) =2386859a(25) =1999848a(26) =1633601a(27) =1295633a(28) =1272a(29) =653419
External references
- oeis: A294952