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A004069
Numbers of points in nontrivial partial geometries.
0
15, 27, 40, 45, 64
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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
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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)