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A235857 Associated with random Penrose-Robinson tilings of the plane. 4
1, 2, 12, 1536, 519045120, 156130677884314787512320, 12538151702000091464104493325082133822247601116646227522355200 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
COMMENTS
In the Mathematica code, let p=A235857; q=A235858 for convenience.
LINKS
Steven R. Finch, Substitution dynamics, January 23, 2014. [Cached copy, with permission of the author]
C. Godrèche and J. M. Luck, Quasiperiodicity and randomness in tilings of the plane, J. Statist. Phys. 55 (1989) 1-28.
MATHEMATICA
p[n_] := p[n] = 2 p[n-1] q[n-1] - p[n-1]^2 q[n-2];
q[n_] := 2 p[n] q[n-1] - p[n-1] p[n-2] q[n-1] q[n-2]^2;
p[0] = 1; q[0] = 1; p[1] = 2; q[1] = 4;
CROSSREFS
Sequence in context: A176391 A123743 A111180 * A085912 A085895 A090904
KEYWORD
nonn
AUTHOR
Steven Finch, Jan 16 2014
STATUS
approved

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Last modified March 29 04:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)