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A234947 Number of different optimal triangle difference sets M(n,2). 2
1, 3, 12, 8, 21, 720, 4079, 3040, 20505, 1669221, 14708525, 10567748 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
Table of n, a(n) for n=1..12.
J. B. Shearer, Difference Triangle Sets: Known optimal solutions.
J. B. Shearer, Difference Triangle Sets: Discoverers
CROSSREFS
A row of array in A234944. Cf. A234943.
Sequence in context: A344112 A337203 A013188 * A051353 A070706 A239932
Adjacent sequences: A234944 A234945 A234946 * A234948 A234949 A234950
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jan 08 2014
STATUS
approved

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Last modified June 7 00:43 EDT 2024. Contains 373140 sequences. (Running on oeis4.)