A274326 Number of distinct irregular n-gon flexagons.

0, 0, 1, 2, 11, 40

Offset: 2

Author

Christian Schroeder, Jun 18 2016

Keywords

• nonn
• hard
• more

Examples

			a(6) = 11, because there are 11 distinct irregular hexaflexagons.
		

References

• Les Pook, Flexagons inside out, Cambridge University Press, 2003, p. 84.

Crossrefs

Cf. A001683.