a(0) = 1; thereafter a(n) = 2^(prime(n)-1) + Sum_{k=1..n} 2^(prime(n)-prime(k)).
A333392
a(0) = 1; thereafter a(n) = 2^(prime(n)-1) + Sum_{k=1..n} 2^(prime(n)-prime(k)).
Terms
- a(0) =1a(1) =3a(2) =7a(3) =29a(4) =117a(5) =1873a(6) =7493a(7) =119889a(8) =479557a(9) =7672913a(10) =491066433a(11) =1964265733a(12) =125713006913
External references
- oeis: A333392