|
| |
|
|
A072938
|
|
Highly composite numbers which are half of the next highly composite number.
|
|
11
| | |
|
|
|
OFFSET
| 1,2
|
|
|
COMMENTS
| A002182(k) such that A002182(k+1) = 2*A002182(k).
Numbers m such that d(m)>=d(k) for 0<k<2m {d(n) being the number of divisors function: A000005(n)} - Lekraj Beedassy (blekraj(AT)yahoo.com), Dec 16 2004
W. Brefeld (cf. link) gives a proof that there are no other terms. - Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Mar 05 2006
|
|
|
LINKS
| Werner Brefeld, Ramanujan, zusammengesetzte Zahlen und ihre Teilbarkeit
Achim Flammenkamp Highly Composite Numbers
|
|
|
EXAMPLE
| 6 = A002182(4) is a term since A002182(5) = 12 = 2*6.
|
|
|
CROSSREFS
| Cf. A002182, A002201, A106037, A094348, A003418, A002110.
A165412. [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jan 20 2010]
Sequence in context: A189394 A182862 * A160274 A048803 A068625 A162935
Adjacent sequences: A072935 A072936 A072937 * A072939 A072940 A072941
|
|
|
KEYWORD
| nonn,fini,full
|
|
|
AUTHOR
| Anon, Aug 12, 2002
|
|
|
EXTENSIONS
| Edited by Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Aug 13 2002
|
| |
|
|
