A289442 Number of abelian groups of order n which fail to meet a certain bound on the size of an unrestricted sumset.

0, 0, 0, 0, 1, 0, 0, 1, 2, 2, 3, 1, 2, 2, 2, 4, 5, 4, 6

Offset

2,9

References

D. Manandhar, Decoding minimum h-fold restricted sumset size of a cyclic group. Research Papers in Mathematics, B. Bajnok, ed., Gettysburg College, Vol. 13 (2012).

Links

Table of n, a(n) for n=2..20.

Bela Bajnok, Additive Combinatorics: A Menu of Research Problems, arXiv:1705.07444 [math.NT], May 2017. See p. 113.

Crossrefs

Sequence in context: A269978 A351258 A097028 * A092331 A299029 A200747

Adjacent sequences: A289439 A289440 A289441 * A289443 A289444 A289445

Keyword

nonn,more

Author

N. J. A. Sloane, Jul 07 2017

Status

approved