Number of distinct (non-overlapping) twin Harshad numbers whose sum is prime and where the 2nd Harshad is <= 10^n.
A060289
Number of distinct (non-overlapping) twin Harshad numbers whose sum is prime and where the 2nd Harshad is <= 10^n.
Terms
- a(0) =4a(1) =5a(2) =17a(3) =53a(4) =250a(5) =1404a(6) =9013a(7) =58608a(8) =401614a(9) =2908740a(10) =21832530
External references
- oeis: A060289