|
| |
|
|
A078502
|
|
a(n) = smallest positive integer N such that (N - k)/k is prime for k = 1, 2, ..., n.
|
|
2
| |
|
|
3, 6, 12, 12, 174600, 7224840, 10780560, 10780560, 1086338816640, 50060257410240, 7720634052774720, 227457297898150320, 7272877497848202240, 7272877497848202240
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| The idea for the sequence and first eleven terms are from Ken Wilke.
|
|
|
LINKS
| C. Rivera, Puzzle 206. (N-k)/k Primes in www.primepuzzles.net
|
|
|
EXAMPLE
| (12-k)/k is prime for k = 1,2,3,4 and 12 is the smallest positive integer satisfying this property. Hence a(4) = 12.
|
|
|
CROSSREFS
| See A093554 for another version.
Sequence in context: A182633 A038587 A090553 * A107974 A116625 A062053
Adjacent sequences: A078499 A078500 A078501 * A078503 A078504 A078505
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Jan 05 2003
|
|
|
EXTENSIONS
| Corrected and extended by Jens Kruse Andersen (jens.k.a(AT)get2net.dk), Jan 10 2003
|
| |
|
|
