A197461 Number of fixed poly-[3.6.3.6]-tiles (holes allowed) with n cells (division into rhombi is significant).

3, 6, 14, 36, 99, 281, 816, 2415, 7260, 22074, 67743, 209552, 652566, 2043672, 6431715, 20328504, 64494678, 205303537, 655493697, 2098500135, 6734498816, 21660087087

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..22.

Crossrefs

Cf. A197459, A197460.

Sequence in context: A147772 A129703 A001550 * A100446 A106395 A369544

Adjacent sequences: A197458 A197459 A197460 * A197462 A197463 A197464

Keyword

hard,more,nonn

Author

Joseph Myers, Oct 15 2011

Extensions

a(18)-a(22) from Aaron N. Siegel, May 16 2022

Status

approved