login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A103642 Number of tilings of the Aztec dungeon E_n. 0

%I

%S 1,26,2197,371293,1631461442,23298085122481,665416609183179841,

%T 494129058146900785408826,1192533292512492016559195008117,

%U 5756130429098929077956071497934208653

%N Number of tilings of the Aztec dungeon E_n.

%H M. Ciucu, <a href="https://arxiv.org/abs/math/0501521">Perfect matchings and perfect powers</a>, arXiv:math/0501521 [math.CO], 2005.

%F Recurrence: a(n+6) = 13^(4n+16)*a(n), starting with 1, 2*13, 13^3, 13^5, 2*13^8, 13^12.

%o (PARI) a(n)=if(n<1,n==0,if(n<6,[2*13,13^3,13^5,2*13^8,13^12][n],13^(4*n-8)*a(n-6)))

%K nonn

%O 0,2

%A _Ralf Stephan_, Feb 19 2005

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 9 04:05 EDT 2020. Contains 333343 sequences. (Running on oeis4.)