OFFSET
2,1
COMMENTS
a(1) is undefined because only one number (1) has 1 divisor.
EXAMPLE
a(4) = 24 because the two smallest numbers with 4 divisors are 6 and 8 and the LCM of 6 and 8 is 24.
PROG
(PARI) A137868(i, l) = { for(n=1, i, one=0; two=0; for(j=2, l, if (numdiv(j)==n && one!=0, two=j; result=lcm(one, two); print1("n="n" one="one" two="two " result="result" "); break); if (numdiv(j) == n && one==0, one=j); ); ); } - Alexander R. Povolotsky, May 01 2008
CROSSREFS
KEYWORD
nonn
AUTHOR
J. Lowell, Apr 29 2008
EXTENSIONS
More terms from R. J. Mathar, May 03 2008
STATUS
approved