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A152254 Twice A084773. 1
2, 12, 104, 1008, 10272, 107712, 1150592, 12451584, 136053248, 1497664512, 16583583744, 184511361024, 2061074178048, 23100352413696, 259648659554304, 2925683135152128, 33037383972814848, 373774017998094336 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

REFERENCES

Andras Kornai, Mathematical Linguistics (Springer-Verlag 2008), p. 36. (Gives a sequence which matches the first five terms.)

CROSSREFS

Sequence in context: A123897 A052693 A050621 * A157328 A061632 A194951

Adjacent sequences:  A152251 A152252 A152253 * A152255 A152256 A152257

KEYWORD

nonn

AUTHOR

Eric Bach (bach(AT)cs.wisc.edu), Oct 15 2009

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Last modified February 14 15:39 EST 2012. Contains 205635 sequences.