1,1

a(n) = 7*8^floor((n-1)/2)

Cf. A050683.

Sequence in context: A038273 A165425 A153272 this_sequence A009201 A065240 A072399

Adjacent sequences: A117857 A117858 A117859 this_sequence A117861 A117862 A117863

nonn

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