A251075 - OEIS

%I #7 Feb 06 2017 18:22:46

%S 1,1,1,1,1,1,43,117,229,385,591,853,5789,17163,40521,84211,160143,

%T 284639,945352,2743255,7017326,16250983,34801374,69959957,179843441,

%U 479965811,1238082783,3015746329,6925030997,15065972891,35869626723,89673470947,226122534275

%N Number of tilings of a 18 X n rectangle using 3n hexominoes of shape I.

%H Alois P. Heinz, <a href="/A251075/b251075.txt">Table of n, a(n) for n = 0..1000</a>

%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Hexomino">Hexomino</a>

%Y Column k=6 of A251072.

%Y Cf. A250663.

%K nonn

%O 0,7

%A _Alois P. Heinz_, Nov 29 2014