|
Search: id:A154361
|
|
| |
|
| 180, 430, 680, 930, 1180, 1430, 1680, 1930, 2180, 2430, 2680, 2930, 3180, 3430, 3680, 3930, 4180, 4430, 4680, 4930, 5180, 5430, 5680, 5930, 6180, 6430, 6680, 6930, 7180, 7430, 7680, 7930, 8180, 8430, 8680, 8930, 9180
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
Pell's equation X^2-AY^2=1, with Y=a(n); A=25n^2-14n+2 [A154357], or, A=25n^2-36n+13 [A154355]; X=1250n^2-1800n+649 [A154358], or X=1250n^2-700n+99 [154359]
|
|
FORMULA
|
a(n)=250n-70
|
|
EXAMPLE
|
For n=1, a(1)=180; n=2, a(2)=430
|
|
CROSSREFS
|
Cf. A154360, A154359, A154358, A154357, A154355
Sequence in context: A066164 A008891 A015233 this_sequence A004532 A143793 A032774
Adjacent sequences: A154358 A154359 A154360 this_sequence A154362 A154363 A154364
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jan 08 2009
|
|
|
Search completed in 0.002 seconds
|
