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A012266 Duplicate of A009468. 0
0, 0, 2, 6, 22, 100, 428, 1008, 12504, 325152, 5509368, 85326120, 1301444520 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..12.

CROSSREFS

Sequence in context: A012272 A009789 A012271 * A009468 A088819 A177478

Adjacent sequences:  A012263 A012264 A012265 * A012267 A012268 A012269

KEYWORD

dead

STATUS

approved

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Last modified April 20 01:03 EDT 2021. Contains 343117 sequences. (Running on oeis4.)