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A013576 Minimal scope of an (n,4) difference triangle. 1
11, 22, 32, 41, 51, 60, 71, 80, 91, 100, 111, 120, 131, 140, 151 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

CRC Handbook of Combinatorial Designs, 1996, p. 315.

LINKS

Table of n, a(n) for n=1..15.

J. B. Shearer, Difference Triangle Sets: Known optimal solutions.

J. B. Shearer, Difference Triangle Sets: Discoverers

CROSSREFS

Sequence in context: A178736 A054728 A178897 * A065998 A073729 A073730

Adjacent sequences:  A013573 A013574 A013575 * A013577 A013578 A013579

KEYWORD

nonn,hard

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified April 26 11:46 EDT 2019. Contains 322472 sequences. (Running on oeis4.)