OFFSET
0,2
COMMENTS
a(n), called G(n,2), is known to be divisible by 4n for n >= 2. - Fred Lunnon, Dec 08 2013
REFERENCES
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
LINKS
R. Dickau, Map Folding
R. Dickau, Folding a 2xn Sheet of Labeled Stamps, Wolfram Demonstrations Project
W. F. Lunnon, Multi-dimensional map-folding, Computer Journal 14 1971 75-80.
Eric Weisstein's World of Mathematics, Map Folding
CROSSREFS
KEYWORD
nonn,more
AUTHOR
EXTENSIONS
a(12)-a(18) from Fred Lunnon, Dec 08 2013
STATUS
approved