OFFSET
2,2
COMMENTS
A051569 (taken from the Martin Gardner references) is another version of this sequence. - N. J. A. Sloane, May 22 2014
REFERENCES
M. Gardner, The Last Recreations, Springer, 1997, p. 282.
M. Gardner, The Colossal Book of Mathematics, 2001, p. 209.
LINKS
Erich Friedman, Illustration of initial terms
Sean A. Irvine, Java program (github)
CROSSREFS
KEYWORD
nonn,nice,more
AUTHOR
Robert Trent (trentrd(AT)hotmail.com), Aug 23 2000
EXTENSIONS
a(8)-a(9) from Sean A. Irvine, Oct 01 2021
STATUS
approved