VOOZH about

URL: https://oeis.org/A072938

⇱ A072938 - OEIS

login
A072938
Highly composite numbers that are half of the next highly composite number.
12
1, 2, 6, 12, 60, 360, 2520
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, Dec 16 2004
W. Brefeld (cf. link) gives a proof that there are no other terms. - Klaus Brockhaus, Mar 05 2006
EXAMPLE
6 = A002182(4) is a term since A002182(5) = 12 = 2*6.
KEYWORD
nonn,fini,full
AUTHOR
Anonymous, Aug 12 2002
EXTENSIONS
Edited by Klaus Brockhaus, Aug 13 2002
STATUS
approved