a(n) is the numerator of Sum_{k = 1..n} 1 / (k*A375781(k)).
A375521
a(n) is the numerator of Sum_{k = 1..n} 1 / (k*A375781(k)).
Terms
- a(0) =0a(1) =1a(2) =5a(3) =14a(4) =103a(5) =1154a(6) =1336333a(7) =892896284279
External references
- oeis: A375521
A375521
a(n) is the numerator of Sum_{k = 1..n} 1 / (k*A375781(k)).