login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with every one adjacent to exactly 1 other one.
0

%I #4 Mar 31 2012 12:35:21

%S 1,1,2,2,5,11,37,100,493,1878,13284,74395,745275,5833759,83605003,

%T 936808185,19121040653,305862769758,8892563071671,202363258898765,

%U 8388963351859194,272273853161584435,16084335957849229172

%N Number of planar n X n X n binary triangular grids with mirror symmetry about one altitude with every one adjacent to exactly 1 other one.

%K nonn

%O 0,3

%A _R. H. Hardin_ Jan 04 2009