
COMMENTS

Using ? to indicate a term whose value is presently unknown, the sequence reads 1, 191, 171, 30958077, 3277, 2731, 28087, ?, 233017, 432541, 953251, 699051, 12905551, 1797559, ?, ?, ?, ?, 7064091, ... This is based on several years work using a variety of algorithms.  N. Clift, May 23 2008
It was conjectured that no shortest addition chains exist such that A003313(m)=A003313(m*2^k) for k>1. This is now known to be false, since a(4) != 0.


CROSSREFS

Cf. A003313 [l(k)], A086878 [l(k)=l(2*k)], A116459 [l(k)=l(3*k)], A261986 [l(k)=l(4*k)], A116460 [l(k)=l(5*k], A116461 [l(k)=l(6*k)], A116462 [l(k)=l(7*k)], A116463 [l(k)=l(9*k], A117151 [l(k)=l(10*k)].
Sequence in context: A238813 A103494 A104642 * A160784 A139650 A139977
Adjacent sequences: A115013 A115014 A115015 * A115017 A115018 A115019
