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A234473 Decimal expansion of exp(exp(1)-1). 4
5, 5, 7, 4, 9, 4, 1, 5, 2, 4, 7, 6, 0, 8, 8, 0, 6, 2, 3, 9, 6, 6, 9, 7, 5, 9, 2, 2, 7, 4, 0, 4, 8, 4, 3, 0, 5, 7, 0, 6, 0, 9, 3, 0, 9, 7, 5, 9, 4, 7, 0, 0, 2, 1, 1, 9, 2, 9, 8, 2, 3, 7, 8, 3, 8, 5, 7, 0 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Derived from an infinite sum of the Bell numbers (see formula below).
May also be written as exp(exp(1))/exp(1) = e^e/e.
LINKS
Michael Ian Shamos, Shamos's catalog of the real numbers, (2011).
FORMULA
Equals Sum_{n>=0} Bell(n)/n!, where Bell(n) = A000110(n).
Equals Product_{k=1..oo} exp(1/k!). - Christoph B. Kassir, Dec 04 2021
EXAMPLE
5.5749415247608806239669759227404843057060930975947002119298237838570...
MATHEMATICA
RealDigits[Exp[E-1], 10, 100][[1]] (* Amiram Eldar, Dec 04 2021 *)
PROG
(PARI) exp(exp(1)-1)
CROSSREFS
Cf. A000110, A001113 (e), A073226 (e^e), A274169.
Sequence in context: A222392 A049471 A049789 * A011500 A003103 A122273
KEYWORD
nonn,cons
AUTHOR
Richard R. Forberg, Dec 26 2013
STATUS
approved

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Last modified March 19 04:26 EDT 2024. Contains 370952 sequences. (Running on oeis4.)