

A006050


Smallest number of additive persistence n.
(Formerly M4683)


9




OFFSET

0,2


REFERENCES

H. J. Hindin, The additive persistence of a number, J. Rec. Math., 7 (No. 2, 1974), 134135.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).


LINKS

Table of n, a(n) for n=0..4.
N. J. A. Sloane, The persistence of a number, J. Recreational Math., 6 (1973), 9798.
Eric Weisstein's World of Mathematics, Additive Persistence.


FORMULA

For n>1 a(n)=2*10^((a(n1)1)/9)1.


MATHEMATICA

lst = {0, 10}; Do[AppendTo[lst, 2*10^((lst[[1]]  1)/9)  1], {3}]; lst (* Arkadiusz Wesolowski, Oct 17 2012 *)


CROSSREFS

Cf. A003001, A045646.
Sequence in context: A121725 A110368 * A045646 A212594 A023916 A172503
Adjacent sequences: A006047 A006048 A006049 * A006051 A006052 A006053


KEYWORD

nonn,base,nice


AUTHOR

N. J. A. Sloane.


EXTENSIONS

Next term is 1 followed by 2222222222222222222222 9s.


STATUS

approved



