|
Search: id:A063509
|
|
|
| A063509 |
|
Square-free Lucas numbers. |
|
+0
1
|
|
| 2, 1, 3, 7, 11, 29, 47, 123, 199, 322, 521, 843, 2207, 3571, 9349, 15127, 39603, 64079, 103682, 167761, 271443, 1149851, 3010349, 4870847, 12752043, 20633239, 33385282, 54018521, 87403803, 228826127, 370248451, 969323029, 1568397607
(list; graph; listen)
|
|
|
OFFSET
|
0,1
|
|
|
LINKS
|
Harry J. Smith, Table of n, a(n) for n=0,...,200
|
|
PROGRAM
|
(PARI) for(n=0, 30, x=fibonacci(n)+2*fibonacci(n-1); if(issquarefree(x), print(x)))
(PARI) { n=-1; g=1; f=0; for (m=0, 10^9, if (issquarefree(a=f + 2*g), write("b063509.txt", n++, " ", a); if (n==200, break)); h=g; g=f; f+=h ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Aug 24 2009]
|
|
CROSSREFS
|
Cf. A000032.
Sequence in context: A112027 A024404 A077173 this_sequence A137766 A010758 A019224
Adjacent sequences: A063506 A063507 A063508 this_sequence A063510 A063511 A063512
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Jason Earls (zevi_35711(AT)yahoo.com), Aug 09 2001
|
|
EXTENSIONS
|
More terms from Dean Hickerson, Aug 22 2001
|
|
|
Search completed in 0.002 seconds
|
