A274326 Number of distinct irregular n-gon flexagons.

0, 0, 1, 2, 11, 40

Offset

2,4

References

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

Links

Table of n, a(n) for n=2..7.

Example

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

Crossrefs

Cf. A001683.

Sequence in context: A296593 A125064 A361493 * A055329 A193005 A152895

Adjacent sequences: A274323 A274324 A274325 * A274327 A274328 A274329

Keyword

nonn,hard,more

Author

Christian Schroeder, Jun 18 2016

Status

approved