1,2

The definition similar to this except that it reaches 2 is simply 1, 2, 3, 6.

The sequence ends at a(13) because Sum_{n=1..13} 1/a(n) = 3. - Joerg Arndt, Sep 06 2019

Table of n, a(n) for n=1..13.

11 does not qualify for the term after 10 because the sum of the reciprocals of the first 11 terms would then fall between 3.01 and 3.02.

Cf. A281873 (sum <= 4).

Sequence in context: A239616 A231848 A200373 * A004839 A032993 A081385

Adjacent sequences: A140332 A140333 A140334 * A140336 A140337 A140338

fini,full,nonn

J. Lowell, Jul 21 2008

approved