Smallest semiprime containing exactly n 4's.
A104690
Smallest semiprime containing exactly n 4's.
Terms
- a(0) =4a(1) =445a(2) =4414a(3) =44441a(4) =444441a(5) =4444441a(6) =44444441a(7) =444444449a(8) =4444444441a(9) =44444444443a(10) =444444444447
External references
- oeis: A104690