a(n) is the smallest j such that 1/1 + 1/4 + 1/7 + ... + 1/j exceeds n.
A091463
a(n) is the smallest j such that 1/1 + 1/4 + 1/7 + ... + 1/j exceeds n.
Terms
- a(0) =4a(1) =52a(2) =1060a(3) =21301a(4) =427873a(5) =8594032a(6) =172615738a(7) =3467079760a(8) =69638158519
External references
- oeis: A091463