3,2
P. A. MacMahon, Combinations derived from m identical sets of n different letters and their connexion with general magic squares, Proc. London Math. Soc., 17 (1917), 25-41.
Adjacent sequences: A002133 A002134 A002135 this_sequence A002137 A002138 A002139
Sequence in context: A071076 A112501 A093345 this_sequence A117226 A117156 A113229
nonn
njas
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