|
| |
|
|
A110464
|
|
Oddly colossally abundant numbers.
|
|
2
| |
|
|
3, 15, 45, 315, 3465, 45045, 135135, 675675, 11486475, 218243025, 5019589575, 145568097675, 4512611027925, 31588277195475, 94764831586425, 3506298768697725, 143758249516606725, 6181604729214089175
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| The usual colossally abundant numbers (CANs) are defined in A004490; none of them is odd. Oddly CANs are defined similarly, except only odd primes are allowed in the factorization. It is conjectured that the ratio of consecutive oddly CANs is always a prime number. The sequence of those prime numbers is given in A110465.
|
|
|
CROSSREFS
| Sequence in context: A100747 A100737 A178669 * A088108 A163383 A135622
Adjacent sequences: A110461 A110462 A110463 * A110465 A110466 A110467
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| T. D. Noe (noe(AT)sspectra.com), Jul 21 2005
|
|
|
EXTENSIONS
| Name and comment clarified by Jonathan Sondow, Dec 08 2011
|
| |
|
|
