OFFSET
1,3
REFERENCES
Glenn C. Rhoads (rhoads(AT)paul.rutgers.edu), rec.puzzles, Feb 17 2000.
LINKS
Joseph Myers, Polyomino tiling
CROSSREFS
KEYWORD
nonn,hard
AUTHOR
Joe Keane (jgk(AT)jgk.org)
EXTENSIONS
Corrected and extended by Joseph Myers, May 05 2002
More terms from Joseph Myers, Nov 04 2003
a(24) and a(25) from Joseph Myers, Nov 17 2010
STATUS
approved