Number of 2n-digit primes that are concatenation of n two-digit distinct primes p_1...p_n: 10<p_1<p_2<...<p_n>98.
A168519
Number of 2n-digit primes that are concatenation of n two-digit distinct primes p_1...p_n: 10<p_1<p_2<...<p_n>98.
Terms
- a(0) =21a(1) =44a(2) =323a(3) =785a(4) =2620a(5) =4925a(6) =10184a(7) =13848a(8) =19697a(9) =19302a(10) =19040a(11) =13450a(12) =9269a(13) =4538a(14) =2174a(15) =633a(16) =231a(17) =44a(18) =3a(19) =0a(20) =0
External references
- oeis: A168519