|
Search: id:A132209
|
|
|
| A132209 |
|
Sequence allows us to find X values of the equation: 2*X^3 + 3*X^2 = Y^2. |
|
+0
3
|
|
| 0, 3, 11, 23, 39, 59, 83, 111, 143, 179, 219, 263, 311, 363, 419, 479, 543, 611, 683, 759, 839, 923, 1011, 1103, 1199, 1299, 1403, 1511, 1623, 1739, 1859, 1983, 2111, 2243, 2379, 2519, 2663, 2811, 2963, 3119
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
To find Y values: b(n)=(2*n^2 + 6n + 3)(2n + 3).
|
|
FORMULA
|
a(n)=2*n^2 + 6n + 3, with n>=1.
G.f.: x*(1+x)*(3-x)/(1-x)^3. - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 14 2007
|
|
CROSSREFS
|
Cf. A005563, A046092, A001082, A002378, A036666, A062717, A028347, A087475, A000217.
Sequence in context: A072671 A119173 A106201 this_sequence A086497 A121509 A096071
Adjacent sequences: A132206 A132207 A132208 this_sequence A132210 A132211 A132212
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Mohamed Bouhamida (bhmd95(AT)yahoo.fr), Nov 06 2007
|
|
|
Search completed in 0.002 seconds
|
