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A137240 a(n)=number of central binomial coefficients with n digits. +0
1
5, 4, 4, 3, 4, 3, 3, 4, 3, 4, 3, 3, 4, 3, 4, 3, 3, 4, 3, 3, 4, 3, 3, 4, 3, 3, 4, 3, 3, 4, 3, 4, 3, 3, 4, 3, 3, 4, 3, 3, 4, 3, 3, 4, 3, 3, 4, 3, 3, 4, 3, 3, 4, 3, 3, 4, 3 (list; graph; listen)
OFFSET

1,1

EXAMPLE

a(1)=5 because there are 5 central binomial coefficients with 1 digit : 1,1,2,3,6,

CROSSREFS

Cf. A001405.

Adjacent sequences: A137237 A137238 A137239 this_sequence A137241 A137242 A137243

Sequence in context: A125900 A019102 A019179 this_sequence A134206 A134209 A019842

KEYWORD

easy,nonn

AUTHOR

Ctibor O. ZIZKA (ctibor.zizka(AT)seznam.cz), Mar 09 2008

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Last modified October 12 14:39 EDT 2008. Contains 144830 sequences.


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