OFFSET
1,3
COMMENTS
Bell numbers (Also called exponential numbers): A000110.
FORMULA
a(n) = B(n)^B(n).
EXAMPLE
a(4)=3125 because B(4)=5 and we can write 3125=5^5 or 3125=5*5*5*5*5.
MATHEMATICA
#^#&/@BellB[Range[0, 5]] (* Harvey P. Dale, Aug 26 2024 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Omar E. Pol, Aug 25 2007
STATUS
approved