OFFSET
1,2
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..50
V. A. Liskovets, Some easily derivable sequences, J. Integer Sequences, 3 (2000), #00.2.2.
MATHEMATICA
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, May 24 2000
EXTENSIONS
More terms from Philip Sung (phil(AT)main.nu), May 07 2001
Terms a(15) and beyond from Andrew Howroyd, Sep 16 2018
STATUS
approved