A088101 Group the natural numbers with at least two members in each group such that the n-th group sum is a multiple of n. (1,2),(3,4,5,),(6,7,8),(9,10,11,12,13,14,15),(16,17,18,19),(20,21,22,23,24,25,26,27,28),(29,30,31,32,33,34),... Sequence contains the n-th group sum divided by n.

3, 6, 7, 21, 14, 36, 27, 55, 44, 28, 22, 16, 66, 78, 31, 223, 136, 66, 153, 171, 55, 45, 117, 45, 117, 45, 117, 45, 117, 45, 117, 45, 117, 45, 117, 45, 117, 45, 117, 45, 117, 45, 117, 45, 117, 45, 117, 45, 117, 45, 117, 45, 117, 45, 117, 45, 117, 45, 117, 45, 117, 45, 117

Offset

1,1

Comments

The condition 'at least two terms' is imposed to avoid the trivial grouping (1),(2),(3),(4),(5),...

Links

Table of n, a(n) for n=1..63.

Crossrefs

Cf. A088099, A088100.

Sequence in context: A217519 A364007 A106357 * A050867 A019248 A284042

Adjacent sequences: A088098 A088099 A088100 * A088102 A088103 A088104

Keyword

nonn

Author

Amarnath Murthy, Sep 24 2003

Extensions

More terms from Ray Chandler, Oct 13 2003

Status

approved