OFFSET
0,2
COMMENTS
At 6, the sequence becomes periodic with period 81. [T. D. Noe, Oct 05 2008]
REFERENCES
J. Roberts, Lure of the Integers, Math. Assoc. America, 1992, p. 15.
David Singmaster, Proposer, Elementary Problem E3254, Amer. Math. Monthly, Vol. 97, No. 10, December 1990, pages 922-924. [N. J. A. Sloane, Jun 20 2023]
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
LINKS
T. D. Noe, Table of n, a(n) for n = 0..1000
Nick Hobson, Python program for this sequence
Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1).
MATHEMATICA
s=0; Join[{s}, Table[s=FromDigits[Reverse[IntegerDigits[2+s]]], {100}]] (* T. D. Noe, Oct 05 2008 *)
NestList[FromDigits[Reverse[IntegerDigits[#+2]]]&, 0, 100] (* Harvey P. Dale, Mar 13 2011 *)
CROSSREFS
KEYWORD
nonn,base,easy
AUTHOR
EXTENSIONS
More terms from Jon E. Schoenfield and John W. Layman, Mar 27 2010
STATUS
approved