OFFSET
1,2
LINKS
Harry J. Smith, Table of n, a(n) for n = 1..1000
PROG
(PARI) { for (n=1, 1000, f=factor(binomial(n, n\2))~; a=0; for (i=1, length(f), if (f[2, i]==1, a+=f[1, i])); write("b064143.txt", n, " ", a) ) } \\ Harry J. Smith, Sep 09 2009
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Sep 11 2001
STATUS
approved