OFFSET
0,1
COMMENTS
For additional terms see b-file.
REFERENCES
Conway, J. H. and Guy, R. K. The Book of Numbers. New York: Springer-Verlag, p. 50, 1996.
Dickson, L. E. History of the Theory of Numbers, Vol. 2: Diophantine Analysis. New York: Chelsea, 1952.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..7
Eric Weisstein's World of Mathematics, Octahedral Number.
FORMULA
a(0) = 2, a(n+1) = oct(a(n)) = (2*a(n)^3 + a(n))/3.
MATHEMATICA
RecurrenceTable[{a[0]==2, a[n+1]==(2 a[n]^3 + a[n])/3}, a, {n, 6}] (* Vincenzo Librandi, Sep 16 2018 *)
CROSSREFS
KEYWORD
easy,nonn,less
AUTHOR
Jonathan Vos Post, Nov 15 2004
EXTENSIONS
Edited by Jianing Song, Sep 16 2018
STATUS
approved