A061306 Bell Bell numbers: a(n+1) = B(a(n)), where B() are the Bell numbers, A000110.

1, 2, 52, 1382958545, 58205338024195872785464627063218599149503972126463

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