This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A160996 a(n) = the smallest positive integer with exactly the same number of divisors as in the first n positive integers combined. 0
 1, 4, 16, 24, 48, 192, 120, 240, 4194304, 900, 268435456, 5184, 68719476736, 1099511627776, 3600, 6480, 61440, 805306368, 5040, 46080, 25920, 206158430208, 3932160, 20160, 2415919104, 2985984, 21233664, 1267650600228229401496703205376 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS a(n) = the smallest positive integer with exactly sum{k=1 to n} d(k) (or sum{k=1 to n} floor(n/k)) divisors. LINKS FORMULA a(n) = A005179(A006218(n)). CROSSREFS Cf. A005179, A006218. Sequence in context: A192199 A145229 A174999 * A173926 A305884 A239522 Adjacent sequences:  A160993 A160994 A160995 * A160997 A160998 A160999 KEYWORD nonn AUTHOR Leroy Quet, Jun 01 2009 EXTENSIONS Extended by Ray Chandler, Jun 13 2009 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified October 22 09:56 EDT 2019. Contains 328315 sequences. (Running on oeis4.)