A103643 Number of tilings of a special lattice of order n.

1, 2, 6, 6, 6, 6, 27, 486, 486, 486, 486, 6561, 531441, 531441, 531441, 531441, 43046721, 10460353203, 10460353203, 10460353203, 10460353203, 7625597484987, 5559060566555523, 5559060566555523, 5559060566555523

Offset

0,2

Links

Table of n, a(n) for n=0..24.

M. Ciucu, Perfect matchings and perfect powers, arXiv:math/0501521 [math.CO], 2005.

Formula

Recurrence: a(n+30) = 3^(4f(n))*a(n), with f a 5-periodic function.

Crossrefs

Sequence in context: A278253 A294961 A048765 * A079892 A096014 A071888

Adjacent sequences: A103640 A103641 A103642 * A103644 A103645 A103646

Keyword

nonn

Author

Ralf Stephan, Feb 19 2005

Status

approved