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3,1
Alois P. Heinz, Table of n, a(n) for n = 3..1000
Eric Weisstein's World of Mathematics, Ferrers Diagram
Wikipedia, Ferrers diagram
Column k=3 of A259478.
Sequence in context: A124129 A101301 A103116 * A075321 A258030 A164787
Adjacent sequences: A303850 A303851 A303852 * A303854 A303855 A303856
nonn
Alois P. Heinz, May 01 2018
approved