0,1

Table of n, a(n) for n=0..3.

For n=0, the two sets are the empty set and a set containing a single isolated vertex. - Sean A. Irvine, Nov 23 2019

Sequence in context: A013105 A208210 A216458 * A096695 A084297 A041873

Adjacent sequences: A027679 A027680 A027681 * A027683 A027684 A027685

nonn,hard,more

R. H. Hardin

a(0) corrected by Sean A. Irvine, Nov 23 2019

approved