|
| |
|
|
A005603
|
|
Chains of length n of nearly doubled primes.
(Formerly M4766)
|
|
11
| |
|
|
11, 7, 2, 2131, 1531, 33301, 16651, 15514861, 857095381, 205528443121, 1389122693971, 216857744866621, 758083947856951, 107588900851484911, 69257563144280941
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
REFERENCES
| G. Loh [ Loeh ], Long chains of nearly doubled primes, Math. Comp., 53 (1989), 751-759.
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
|
|
|
CROSSREFS
| A064812 is a better version.
Cf. (A005382 and A005383), A057326, A057327, A057328, A057329, A057330, A005602.
Sequence in context: A190624 A038320 A010185 * A109828 A048981 A132361
Adjacent sequences: A005600 A005601 A005602 * A005604 A005605 A005606
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
|
|
|
EXTENSIONS
| 6th term corrected from 385591 on Feb 23 1995, at rgw's suggestion
a(14) and a(15) found by Paul Jobling (Paul.Jobling(AT)WhiteCross.com) [Oct 23 2000]
|
| |
|
|
