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A051131 Prime Bell numbers (A000110). 2
2, 5, 877, 27644437, 35742549198872617291353508656626642567, 359334085968622831041960188598043661065388726959079837 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

REFERENCES

Bell, E. T. "Exponential Numbers." Amer. Math. Monthly 41, 411-419, 1934.

LINKS

Table of n, a(n) for n=1..6.

Eric Weisstein's World of Mathematics, Bell Numbers

Eric Weisstein's World of Mathematics, Bell Number

EXAMPLE

Bell(2)=2 and Bell(3)=5 are primes, Bell(4)..Bell(6) are composite, Bell(7)=877 is prime.

CROSSREFS

Cf. A000110, A051130.

Sequence in context: A208212 A176117 A078748 * A119748 A101341 A079014

Adjacent sequences:  A051128 A051129 A051130 * A051132 A051133 A051134

KEYWORD

nonn

AUTHOR

Ignacio Larrosa CaƱestro

EXTENSIONS

The next term is too large to include. See A051130.

STATUS

approved

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Last modified April 18 05:34 EDT 2014. Contains 240688 sequences.