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A152254 Twice A084773. 4
2, 12, 104, 1008, 10272, 107712, 1150592, 12451584, 136053248, 1497664512, 16583583744, 184511361024, 2061074178048, 23100352413696, 259648659554304, 2925683135152128, 33037383972814848, 373774017998094336, 4235888981636022272, 48076611822491271168 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

REFERENCES

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

LINKS

Table of n, a(n) for n=0..19.

CROSSREFS

Sequence in context: A052693 A050621 A326237 * A157328 A061632 A301833

Adjacent sequences:  A152251 A152252 A152253 * A152255 A152256 A152257

KEYWORD

nonn

AUTHOR

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

EXTENSIONS

Offset changed by Petros Hadjicostas, Feb 09 2021

STATUS

approved

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Last modified July 31 17:27 EDT 2021. Contains 346376 sequences. (Running on oeis4.)