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A061306 Bell Bell numbers: a(n+1) = B(a(n)), where B() are the Bell numbers, A000110. 1
1, 2, 52, 1382958545, 58205338024195872785464627063218599149503972126463 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

The next term has 281 digits. [From Harvey P. Dale, Nov 28 2011]

REFERENCES

Amarnath Murthy, Generalization of Partition Function. Introducing Smarandache Factor Partitions.Smarandache Notions Journal, Vol. 11, No. 1-2-3, Spring 2000.

LINKS

Table of n, a(n) for n=0..4.

EXAMPLE

a(3) = 52, 5 is the 3rd Bell number and the fifth Bell number is 52.

MAPLE

with(combinat): for n from 1 to 6 do printf(`%d, `, bell(bell(n))) od:

MATHEMATICA

BellB[BellB[Range[5]]] (* Harvey P. Dale, Nov 28 2011 *)

CROSSREFS

Cf. A000110.

Sequence in context: A216354 A079179 A000654 * A249656 A248987 A179616

Adjacent sequences:  A061303 A061304 A061305 * A061307 A061308 A061309

KEYWORD

nonn,easy

AUTHOR

Amarnath Murthy, Apr 26 2001

EXTENSIONS

More terms from James A. Sellers, Sep 26 2001

STATUS

approved

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Last modified October 22 09:56 EDT 2019. Contains 328315 sequences. (Running on oeis4.)