A121150 Minimal number of vertices in an n-polyomino.

4, 6, 8, 9, 11, 12, 14, 15, 16, 18, 19, 20, 22, 23, 24, 25, 27, 28

Offset: 1

Author

Alexander Adamchuk, Aug 12 2006

Keywords

• nonn
• more

Comments

It appears that a(n) = A080037[n] = n + Floor[Sqrt[4n-3]] + 2 for n>0.

Links

• Eric Weisstein's World of Mathematics, Polyomino.

Crossrefs

Cf. A080037.

Extensions

a(17)-a(18) from John Mason, Aug 14 2021