1,1

a(n) = 8*9^floor((n-1)/2)

Cf. A050683.

Sequence in context: A165426 A019216 A020552 this_sequence A082798 A119932 A065241

Adjacent sequences: A117858 A117859 A117860 this_sequence A117862 A117863 A117864

nonn

Martin Renner (martin.renner(AT)gmx.net), May 02 2006