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: A013401 A020465 A092480 * 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