The On-Line Encyclopedia of Integer Sequences (OEIS)

A274326 revision #8

A274326

Number of distinct irregular n-gon flexagons.

0, 0, 1, 2, 11, 40

(list; graph; refs; listen; history; text; internal format)

OFFSET

2,4

REFERENCES

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

LINKS

EXAMPLE

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

CROSSREFS

KEYWORD

nonn,hard,more

AUTHOR

STATUS

approved