Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 4500 articles have referenced us, often saying "we would not have discovered this result without the OEIS".
Table of n, a(n) for n=1..24.
Index entries for sequences related to divisors of numbers
Sequence in context: A162293 A233459 A145803 * A018357 A061489 A117595
Adjacent sequences: A018626 A018627 A018628 * A018630 A018631 A018632
N. J. A. Sloane.