OFFSET
0,1
LINKS
FORMULA
a(n) = A006988(2*n).
CROSSREFS
KEYWORD
nonn
AUTHOR
Jim Snow (jsnow(AT)mitre.org), Jun 22 2006
EXTENSIONS
a(7)-a(9) copied from A006988. - Max Alekseyev, May 11 2009
a(10)-a(12) copied from A006988. - Chai Wah Wu, Sep 19 2018
STATUS
approved