Numbers k such that (10^(2*k+1) + 36*10^k - 1)/9 is prime.
A107125
Numbers k such that (10^(2*k+1) + 36*10^k - 1)/9 is prime.
Terms
- a(0) =0a(1) =1a(2) =7a(3) =45a(4) =115a(5) =681a(6) =1248a(7) =2481a(8) =2689a(9) =6198a(10) =13197a(11) =60126a(12) =100072
External references
- oeis: A107125