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A355562 Number of blunt polypons with n cells. 3
0, 1, 1, 2, 1, 5, 3, 10, 13, 31, 44, 103, 169, 360, 643, 1317, 2479, 5036, 9716, 19592, 38511, 77465, 153686, 309093, 617426, 1243392, 2496186, 5035612 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
COMMENTS
Polypons are defined in A057784. A blunt polypon is a polypon with no internal angle of 30 degrees.
Comments by Joseph Myers in A057784 regarding division of hexagons also apply to this sequence.
LINKS
Andrew Clarke, Other Polyforms [beware of errors for this particular form]
Sean A. Irvine, Java program (github)
Sean A. Irvine, The 5 blunt 6-pons
Sean A. Irvine, The 44 blunt 11-pons
CROSSREFS
Cf. A057784, A057785 (erroneous version).
Sequence in context: A179218 A131119 A114901 * A194809 A113178 A108362
KEYWORD
nonn,nice,hard,more
AUTHOR
Sean A. Irvine, Jul 06 2022
STATUS
approved

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Last modified March 2 12:34 EST 2024. Contains 370467 sequences. (Running on oeis4.)