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A162171 Third column of A162170. 1
1, 3, 6, 20, 75, 336, 1708, 9792, 62325, 436480, 3334386, 27595776, 245951614, 2348666870 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

CROSSREFS

Cf. A162170.

Sequence in context: A090371 A168594 A123559 * A194992 A163881 A019017

Adjacent sequences:  A162168 A162169 A162170 * A162172 A162173 A162174

KEYWORD

nonn,more

AUTHOR

Mats Granvik (mats.granvik(AT)abo.fi), Jun 27 2009

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Last modified February 17 14:50 EST 2012. Contains 206050 sequences.