A051131 Prime Bell numbers (A000110).

2, 5, 877, 27644437, 35742549198872617291353508656626642567, 359334085968622831041960188598043661065388726959079837

Offset

1,1

Links

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

E. T. Bell, Exponential numbers, Amer. Math. Monthly, 41 (1934), 411-419.

The Prime Database, Bell(2841), the next term which is too large to include here.

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: A176117 A369022 A078748 * A306785 A119748 A101341

Adjacent sequences: A051128 A051129 A051130 * A051132 A051133 A051134

Keyword

nonn,changed

Author

Ignacio Larrosa Cañestro

Status

approved