A088100 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 number of members in the n-th group.

2, 3, 3, 7, 4, 9, 6, 11, 8, 5, 4, 3, 12, 13, 5, 32, 17, 8, 18, 19, 6, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5, 13, 5

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..86.

Crossrefs

Cf. A088099, A088101.

Sequence in context: A323952 A168140 A333699 * A097359 A358182 A208525

Adjacent sequences: A088097 A088098 A088099 * A088101 A088102 A088103

Keyword

nonn

Author

Amarnath Murthy, Sep 24 2003

Extensions

More terms from Ray Chandler, Oct 13 2003

Status

approved