A197463 Number of one-sided poly-[4.6.12]-tiles (holes allowed) with n cells (division into triangles is significant).

2, 3, 6, 13, 28, 66, 148, 349, 828, 2005, 4880, 12043, 29852, 74645, 187498, 473448, 1199630, 3050554, 7778234, 19885465, 50950796, 130824763, 336555890, 867389312, 2239220294, 5789804688

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..26.

Crossrefs

Cf. A197462, A197464.

Sequence in context: A316694 A000646 A316770 * A032048 A287128 A286062

Adjacent sequences: A197460 A197461 A197462 * A197464 A197465 A197466

Keyword

hard,nonn

Author

Joseph Myers, Oct 15 2011

Extensions

a(20)-a(26) from Aaron N. Siegel, Jun 03 2022

Status

approved