OFFSET
1,1
REFERENCES
Dumitrescu, Adrian; and Steiger, William; On a matching problem in the plane. Discrete Math. 211, No.1-3, 183-195 (2000). Zbl 0953.52009
CROSSREFS
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Dec 11 2011
EXTENSIONS
It is known that a(9)=14, a(10)=16 (which is enough to show that this sequence is different from others in the OEIS with same start).
STATUS
approved