|
Search: id:A082418
|
|
|
| A082418 |
|
Numbers n such that P(n) > P(n+1) < P(n+2), where P(n) = largest prime factor of n (A006530). |
|
+0
3
|
|
| 3, 5, 7, 11, 15, 17, 19, 23, 26, 29, 31, 35, 39, 41, 44, 47, 49, 51, 53, 55, 59, 63, 65, 67, 69, 71, 74, 76, 80, 83, 87, 89, 95, 97, 99, 101, 104, 107, 109, 111, 113, 116, 119, 124, 127, 129, 131, 134, 137, 139, 143, 146, 149, 153, 155, 159, 161, 164, 167, 174, 179, 181, 183
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
REFERENCES
|
Antal Balog, On the largest prime factor of consecutive integers, Abstracts Amer. Math. Soc., 25 (No. 2, 2002), p. 337, #975-11-76.
P. Erdos and C. Pomerance, On the largest prime factors of n and n+1, Aequationes Math. vol. 17, 1978, pp. 311-321.
|
|
LINKS
|
T. D. Noe, Table of n, a(n) for n=1..1000
|
|
FORMULA
|
a(n) = A100390(n) - 1. - T. D. Noe, Nov 26 2007
|
|
CROSSREFS
|
Cf. A006530, A082417-A082422, A071869, A071870.
Adjacent sequences: A082415 A082416 A082417 this_sequence A082419 A082420 A082421
Sequence in context: A072151 A029626 A111622 this_sequence A085493 A139252 A076245
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
njas, Apr 25 2003
|
|
|
Search completed in 0.002 seconds
|
