|
Search: id:A154277
|
|
| |
|
| 17, 26, 197, 530, 1025, 1682, 2501, 3482, 4625, 5930, 7397, 9026, 10817, 12770, 14885, 17162, 19601, 22202, 24965, 27890, 30977, 34226, 37637, 41210, 44945, 48842, 52901, 57122, 61505, 66050, 70757, 75626, 80657, 85850, 91205, 96722
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
COMMENT
|
Pell's equation X^2-A^2=1, with X=a(n); A=9n^2-10n+3 [A154262], or, A=9n^2-8n+2 [A154254]; Y= 27n+12 [A154266], or, Y=27n+15 [A154267]
|
|
FORMULA
|
a(n)=81n^2-72n+17
|
|
EXAMPLE
|
For n=0, a(0)=17; n=2, a(2)=197
|
|
CROSSREFS
|
Cf. A154276, A154262, A154254, A154266, A154267
Adjacent sequences: A154274 A154275 A154276 this_sequence A154278 A154279 A154280
Sequence in context: A120143 A031204 A085051 this_sequence A140150 A166658 A033702
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Vincenzo Librandi (vincenzo.librandi(AT)tin.it), Jan 06 2009
|
|
EXTENSIONS
|
92205 replaced by 91205 - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Jan 07 2009
|
|
|
Search completed in 0.002 seconds
|
