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A012268 Duplicate of A009655. 0
0, 0, 2, 6, 22, 100, 788, 8568, 103416, 1307808, 17722512, 264361680, 4373968080 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

CROSSREFS

Sequence in context: A012270 A009585 A012267 * A009655 A002772 A000140

Adjacent sequences:  A012265 A012266 A012267 * A012269 A012270 A012271

KEYWORD

dead

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Last modified February 17 02:48 EST 2012. Contains 205978 sequences.