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A173412 Number of three-choice polygons by area. 0
4, 12, 34, 96, 262, 706, 1866, 4876, 12590, 32220, 81780, 206182, 516682, 1288100, 3196414, 7899664, 19452002, 47741832, 116827972, 285121530, 694145540, 1686165640, 4087501476, 9889956114, 23887544730, 57602999360, 138696210062, 333483756402, 800784138674, 1920539773188, 4600776445384, 11009534409116, 26318680827474, 62855267076802, 149976974496002, 357547693790338, 851705230512838, 2027255882196068 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

A. J. Guttmann and I. Jensen, Fuchsian differential equations for the perimeter generating function of three-choice polygons, Sem. Lothar. Combin., 54 (2006), B54c (14pp).

LINKS

Table of n, a(n) for n=1..38.

A. J. Guttmann and I. Jensen, Fuchsian differential equations for the perimeter generating function of three-choice polygons, Sem. Lothar. Combin., 54 (2006), B54c (14pp).

CROSSREFS

Sequence in context: A248873 A180224 A293005 * A079818 A115390 A005056

Adjacent sequences:  A173409 A173410 A173411 * A173413 A173414 A173415

KEYWORD

nonn

AUTHOR

Iwan Jensen (I.Jensen(AT)ms.unimelb.edu.au), Feb 17 2010, corrected Feb 21 2010

STATUS

approved

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Last modified March 24 11:34 EDT 2019. Contains 321448 sequences. (Running on oeis4.)