2,2

This may already be in the OEIS - the reference does not give enough terms to check. It would also be nice to give the definition here.

Lucas chains are addition chains with additional requirements on the presence of differences between members of the chain. Therefore a(n) >= A003313(n) and A104892(n) <= A003064(n). Shortest simple Lucas chains are constrained even further (forbid duplication between adjacent members). Therefore a(n) <= A105195(n). - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), May 24 2008

Daniel Bleichenbacher, Efficiency and Security of Cryptosystems based on Number Theory. PhD Thesis, Diss. ETH No. 11404, Zuerich 1996. See p. 64.

Cf. A104892, A105195, A003313.

Sequence in context: A075167 A057935 A124831 this_sequence A157790 A070241 A066412

Adjacent sequences: A105093 A105094 A105095 this_sequence A105097 A105098 A105099

nonn

N. J. A. Sloane (njas(AT)research.att.com), May 23 2008