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A038393 Number of 4n-step self-avoiding closed paths on first quadrant grid, passing through origin, symmetric about line y = x. +0
1
1, 1, 2, 6, 20, 78, 342, 1608, 7966, 41054, 218342, 1191038, 6635164, 37621952, 216557220, 1262829914, 7447921572 (list; graph; listen)
OFFSET

0,3

CROSSREFS

Cf. A034010.

Sequence in context: A027215 A098469 A081563 this_sequence A027221 A108124 A117574

Adjacent sequences: A038390 A038391 A038392 this_sequence A038394 A038395 A038396

KEYWORD

nonn

AUTHOR

David W. Wilson (davidwwilson(AT)comcast.net)

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Last modified September 7 23:08 EDT 2008. Contains 143486 sequences.


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