0,2

Table of n, a(n) for n=0..5.

N. J. A. Sloane, Illustration for a(4) = 20. (The largest empty region has size 8 X 5 squares, but the squares have width 1/2, so a(4) = 20.)

Cf. A328078, A328080, A337638.

Sequence in context: A336131 A095967 A316429 * A047161 A318193 A048083

Adjacent sequences: A337636 A337637 A337638 * A337640 A337641 A337642

nonn,more

Scott R. Shannon and N. J. A. Sloane, Sep 14 2020

approved