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A085069
a(1) =1, then the smallest number a(n)== 1 ( mod a(n-1)) such that tau(a(n))= n.
1
1, 2, 9, 10, 81, 244, 4826809, 24134046, 258867666103225, 517735332206451
OFFSET
1,2
COMMENTS
a(11) = (2*a(10)-1)^10, which is about 1.4*10^150, too large to include. - David Wasserman, Jan 20 2005
EXAMPLE
a(4) = 10, a(5) = 81 == 1 (mod 10) and tau(81) = 5.
CROSSREFS
Cf. A085070.
Sequence in context: A363223 A338997 A363951 * A371163 A207670 A176545
KEYWORD
nonn
AUTHOR
Amarnath Murthy, Jun 30 2003
EXTENSIONS
More terms from David Wasserman, Jan 20 2005
STATUS
approved