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A059869 Numbers n such that there exist no palindromic heptagonals of length n. 4
8, 9, 14, 16, 32 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..5.

P. De Geest, Palindromic heptagonals

CROSSREFS

Cf. A034822, A034307, A059868, A059870, A000566, A054971, A054910.

Sequence in context: A174041 A096784 A175859 * A213016 A105833 A257037

Adjacent sequences:  A059866 A059867 A059868 * A059870 A059871 A059872

KEYWORD

nonn,base,hard

AUTHOR

Patrick De Geest, Feb 15 2000.

STATUS

approved

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Last modified September 23 05:43 EDT 2018. Contains 315273 sequences. (Running on oeis4.)