|
Search: id:A078586
|
|
|
| A078586 |
|
a(n) is the product of the first n primes of the form 4k+3. |
|
+0
4
|
|
| 3, 21, 231, 4389, 100947, 3129357, 134562351, 6324430497, 373141399323, 25000473754641, 1775033636579511, 140227657289781369, 11638895555051853627, 1198806242170340923581, 128272267912226478823167
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
a(n)+2 is a prime for n=1,2,3,4,8,10,12,17,19,22,23,53.
|
|
LINKS
|
T. D. Noe, Table of n, a(n) for n=1..100
|
|
MATHEMATICA
|
maxN=15; pLst={}; k=0; While[Length[pLst]<maxN, k++; If[PrimeQ[4k-1], AppendTo[pLst, 4k-1]]]; lst=Drop[FoldList[Times, 1, pLst], 1]
|
|
CROSSREFS
|
Cf. A002110, A006278.
Sequence in context: A119097 A008545 A005373 this_sequence A138903 A058562 A145083
Adjacent sequences: A078583 A078584 A078585 this_sequence A078587 A078588 A078589
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
T. D. Noe (noe(AT)sspectra.com), Dec 01 2002
|
|
|
Search completed in 0.002 seconds
|
