A248084 Subsequence of lesser of 3 terms of A095301 that are 2 apart.

12400, 151396, 503800, 831400, 1050028, 1134196, 1461796, 1486600, 1637296, 1762288, 1814200, 1987468, 2424940, 2444596, 2449744, 3237388, 3427396, 3452200, 3779800, 4082596, 4574608, 4799788, 4862284, 4887088, 5065396, 5674732, 5745400, 6048196, 6375796

Offset

1,1

Comments

A095301 lists integers that have a smaller friend, that is, there exists a smaller integer with same abundancy, sigma(x)/x. In A095301 there are some groups of 3 terms with a common difference of 2, motivating this sequence.

A search, up to 10^9, for similar groups of 4 terms provided no such instance.

84346341351244 and 2652126430251504 belong to the group stated above. - Hiroaki Yamanouchi, Oct 16 2014

This sequence lists the terms A248083(n) such that A248083(n+1)=A248083(n)+2. - M. F. Hasler, Oct 03 2014

Links

Table of n, a(n) for n=1..29.

Example

12400 is in the sequence because 12400, 12402 and 12404, with a difference of 2 between each, are in A095301, with smaller friends: 150, 636 and 2658. As a result of this, both 12400 and 12402 can be found in A248083.

Crossrefs

Cf. A095301, A248083 (similar, with only 2 consecutive terms).

Sequence in context: A202563 A061731 A278892 * A224120 A233964 A156116

Adjacent sequences: A248081 A248082 A248083 * A248085 A248086 A248087

Keyword

nonn

Author

Michel Marcus, Oct 01 2014

Status

approved