A197464 - OEIS

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A197464

Number of fixed poly-[4.6.12]-tiles (holes allowed) with n cells (division into triangles is significant).

12, 18, 36, 75, 168, 386, 888, 2079, 4960, 11988, 29280, 72145, 179112, 447636, 1124956, 2840097, 7197780, 18301738, 46669404, 119308938, 305704584, 784938678, 2019335340, 5204309886, 13435321764, 34738762062, 89952855848

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

REFERENCES

Branko Gruenbaum and G. C. Shephard, Tilings and Patterns. W. H. Freeman, New York, 1987, Sections 2.7, 6.2 and 9.4.

LINKS

Table of n, a(n) for n=1..27.

CROSSREFS

Cf. A197462, A197463.

Sequence in context: A162694 A230354 A349180 * A124205 A338259 A133403

Adjacent sequences: A197461 A197462 A197463 * A197465 A197466 A197467

KEYWORD