2,1

J. P. McSorley, Counting structures in the Moebius ladder, Discrete Math., 184 (1998), 137-164.

Sequence in context: A097059 A117390 A048508 this_sequence A058319 A095089 A106922

Adjacent sequences: A020876 A020877 A020878 this_sequence A020880 A020881 A020882

nonn,easy,more

njas