|
Search: id:A086972
|
|
| |
|
| 1, 3, 11, 41, 149, 527, 1823, 6197, 20777, 68891, 226355, 738113, 2391485, 7705895, 24712007, 78918989, 251105873, 796364339, 2518233179, 7942120025, 24988621541, 78452649023, 245818300271, 768835960421, 2400651060089
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
Binomial transform of A057711 (without leading zero). Second binomial transform of (1,1,3,3,5,5,7,7,9,9,11,11,...).
|
|
FORMULA
|
G.f.: (1-4x+5x^2)/((1-x)(1-3x)^2)); a(n)==A027471(n)+A007051(n).
|
|
CROSSREFS
|
Equals (1/2) [A081038(n) + 1].
Sequence in context: A131526 A073622 A075276 this_sequence A077831 A032952 A001835
Adjacent sequences: A086969 A086970 A086971 this_sequence A086973 A086974 A086975
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
Paul Barry (pbarry(AT)wit.ie), Jul 26 2003
|
|
|
Search completed in 0.002 seconds
|
