A004069 Numbers of points in nontrivial partial geometries.

15, 27, 40, 45, 64

Offset

1,1

References

CRC Handbook of Combinatorial Designs, 1996, p. 418.

Links

Table of n, a(n) for n=1..5.

Crossrefs

Sequence in context: A145195 A096022 A097222 * A110978 A274433 A227804

Adjacent sequences: A004066 A004067 A004068 * A004070 A004071 A004072

Keyword

nonn,hard

Author

N. J. A. Sloane

Status

approved