1,1

Cf. A001220, A014127, A123692.

Sequence in context: A152516 A067502 A067509 this_sequence A111727 A115738 A115763

Adjacent sequences: A123690 A123691 A123692 this_sequence A123694 A123695 A123696

bref,hard,nonn

Max Alekseyev (maxale(AT)gmail.com), Oct 07 2006