OFFSET
1,1
COMMENTS
Explicit formula and asymptotic are given by Chang and Chen (2011).
a(7) contains 137 decimal digits.
LINKS
S.-C. Chang, L.-C. Chen. Hamiltonian walks on the Sierpinski gasket, J. Math. Phys. 52 (2011), 023301. doi:10.1063/1.3545358. arXiv:0909.5541.
Eric Weisstein's World of Mathematics, Hamiltonian Path.
Eric Weisstein's World of Mathematics, Sierpiński Gasket Graph.
CROSSREFS
KEYWORD
nonn
AUTHOR
Max Alekseyev, Sep 08 2014
STATUS
approved