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Search: id:A027683
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A027683 Number of independent subsets of n X n toroidal grid. +0
15
1, 7, 34, 743, 25531, 2406862, 464483559, 213256442503, 215560806324388, 498819827260367617, 2590618817013278596997, 30496896080418683388380966, 809724336154415150287031740151 (list; graph; listen)
OFFSET

0,2

CROSSREFS

Cf. A006506 for flat version.

Sequence in context: A027233 A117650 A027842 this_sequence A000829 A061825 A077536

Adjacent sequences: A027680 A027681 A027682 this_sequence A027684 A027685 A027686

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhh(AT)cadence.com)

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Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.


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