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Table of n, a(n) for n=1..21.
Enrique Pérez Herrero, The triangle A096179.
Sequence in context: A229047 A133702 A080001 * A228196 A261326 A136743
Adjacent sequences: A178935 A178936 A178937 * A178939 A178940 A178941
Peter Luschny, Dec 30 2010