1,1
Term a(6) has 89 decimal digits and a(7) has 265. - Andrew Howroyd, Sep 08 2017
Andrew Howroyd, Table of n, a(n) for n = 1..7
Eric Weisstein's World of Mathematics, Connected Graph
Eric Weisstein's World of Mathematics, Sierpinski Sieve Graph
Eric Weisstein's World of Mathematics, Vertex-Induced Subgraph
Sequence in context: A020465 A092480 A354211 * A088143 A124880 A227100
Adjacent sequences: A292064 A292065 A292066 * A292068 A292069 A292070
nonn
Eric W. Weisstein, Sep 08 2017
a(4)-a(5) from Andrew Howroyd, Sep 08 2017
approved