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A068392 Number of partitions of n X n checkerboard into two edgewise-connected sets, counting partitions equal under rotation or reflection only once. 4
0, 2, 11, 92, 2100, 140834 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..6.

CROSSREFS

Cf. A068381, A068393.

Sequence in context: A122708 A225623 A005366 * A164893 A099697 A083069

Adjacent sequences:  A068389 A068390 A068391 * A068393 A068394 A068395

KEYWORD

nonn,more

AUTHOR

R. H. Hardin, Mar 03 2002

STATUS

approved

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Last modified June 27 11:25 EDT 2017. Contains 288788 sequences.