|
| |
|
|
A087350
|
|
a(n) = Sum_{k=0..n} (3*n)!/(3*k)!.
|
|
1
|
|
|
|
1, 7, 841, 423865, 559501801, 1527439916731, 7478345832314977, 59677199741873516461, 724719913665311983902385, 12718834484826225317486856751, 309830808050366848733979830454361
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
| |
| |
|
|
