2,1
J. P. McSorley, Counting structures in the Moebius ladder, Discrete Math., 184 (1998), 137-164.
Adjacent sequences: A020877 A020878 A020879 this_sequence A020881 A020882 A020883
Sequence in context: A064929 A102993 A143416 this_sequence A046467 A132184 A143322
nonn,easy,more
njas
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