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A298040 Coordination sequence of Dual(4.6.12) tiling with respect to a tetravalent node. 22
1, 4, 20, 24, 40, 40, 60, 56 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Conjecture: For n>0, a(n)=10n if n even, otherwise 8n.

LINKS

Table of n, a(n) for n=0..7.

N. J. A. Sloane, Illustration of initial terms (shows one 90-degree quadrant of tiling)

N. J. A. Sloane, Overview of coordination sequences of Laves tilings [Fig. 2.7.1 of Gr├╝nbaum-Shephard 1987 with A-numbers added and in some cases the name in the RCSR database]

CROSSREFS

Cf. A072154, A298041 (partial sums), A298036 (12-valent node), A298038 (hexavalent node).

List of coordination sequences for Laves tilings (or duals of uniform planar nets): [3,3,3,3,3.3] = A008486; [3.3.3.3.6] = A298014, A298015, A298016; [3.3.3.4.4] = A298022, A298024; [3.3.4.3.4] = A008574, A296368; [3.6.3.6] = A298026, A298028; [3.4.6.4] = A298029, A298031, A298033; [3.12.12] = A019557, A298035; [4.4.4.4] = A008574; [4.6.12] = A298036, A298038, A298040; [4.8.8] = A022144, A234275; [6.6.6] = A008458.

Sequence in context: A273791 A065984 A039569 * A174134 A032425 A194045

Adjacent sequences:  A298037 A298038 A298039 * A298041 A298042 A298043

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Jan 22 2018

STATUS

approved

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Last modified March 18 22:07 EDT 2019. Contains 321305 sequences. (Running on oeis4.)