1,1
Table of n, a(n) for n=1..3.
Eric Weisstein's World of Mathematics, Hanoi Graph
Eric Weisstein's World of Mathematics, Matching
Eric Weisstein's World of Mathematics, Maximal Independent Edge Set
Sequence in context: A168678 A276199 A118913 * A282973 A005042 A317482
Adjacent sequences: A297477 A297478 A297479 * A297481 A297482 A297483
nonn,more
Eric W. Weisstein, Dec 30 2017
approved