1,2
Table of n, a(n) for n=1..21.
Enrique Pérez Herrero, The triangle A096179.
Sequence in context: A328486 A332224 A080001 * A228196 A261326 A136743
Adjacent sequences: A178935 A178936 A178937 * A178939 A178940 A178941
nonn
Peter Luschny, Dec 30 2010
approved