OFFSET
1,2
REFERENCES
Mark Manasse et al., The Panex puzzle, in Tribute to a Mathemagician, Peters, 2005, pp. 145-161.
LINKS
N. Baxter, Panex Puzzle Resources.
FORMULA
for n>=3: a(n) = ((7/4)*(-1 + sqrt(2)))*(1 + sqrt(2))^n + ((7/4)*(-1 - sqrt(2)))*(1 - sqrt(2))^n + ((-1)^n)/2 - 1.
CROSSREFS
KEYWORD
nonn
AUTHOR
William Rex Marshall, Aug 19 2005
STATUS
approved