A320997 An absolute lower bound on the number of components in perfect systems of difference sets (PSDS).

1, 3, 5, 6, 8, 10, 12, 13, 15, 17, 18

Offset

1,2

References

Abrham, J., and A. Kotzig. "Minimizing the number of components in perfect systems of difference sets." Congr. Numerantium, 47 (1985): 7-17. See Table 1, ceiling (h(c)).

Links

Table of n, a(n) for n=1..11.

Crossrefs

Sequence in context: A139437 A233746 A299233 * A083042 A082977 A000210

Adjacent sequences: A320994 A320995 A320996 * A320998 A320999 A321000

Keyword

nonn,more

Author

N. J. A. Sloane, Oct 27 2018

Status

approved