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A157617 On an n X n board, a(n) is the maximal number of squares covered by a self-avoiding cycle made of alternated vertical and horizontal unit length steps. 3
4, 4, 12, 16, 28, 32, 52, 64, 80, 96, 124 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

COMMENTS

From an idea of Leroy Quet, discussed on the SeqFan mailing list.

LINKS

Table of n, a(n) for n=2..12.

Diophante.fr, LES RECREATIONS MATHEMATIQUES, PLUS DE 2000 RECREATIONS ET PROBLEMES MATHEMATIQUES. See Problem G264.

Giovanni Resta, Illustration of initial terms

CROSSREFS

Cf. A157615, A157616.

Sequence in context: A323189 A121189 A136485 * A053415 A303315 A331606

Adjacent sequences:  A157614 A157615 A157616 * A157618 A157619 A157620

KEYWORD

hard,more,nonn

AUTHOR

Giovanni Resta, Mar 03 2009

STATUS

approved

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Last modified April 4 05:34 EDT 2020. Contains 333212 sequences. (Running on oeis4.)