A087350 - cp's OEIS frontend

A087350 a(n) = Sum_{k=0..n} (3n)!/(3k)!.

n	a(n)
0	1
1	7
2	841
3	423865
4	559501801
5	1527439916731
6	7478345832314977
7	59677199741873516461
8	724719913665311983902385
9	12718834484826225317486856751
10	309830808050366848733979830454361
11	10142621332336809160155563729753961697
12	434509897877308904421064350182659719099481

[1, 7, 841, 423865, 559501801, 1527439916731, 7478345832314977, 59677199741873516461, 724719913665311983902385, 12718834484826225317486856751, 309830808050366848733979830454361, 10142621332336809160155563729753961697, 434509897877308904421064350182659719099481]

cp's OEIS Frontend

A087350 a(n) = Sum_{k=0..n} (3n)!/(3k)!.

Table of values

List of values

cp's OEIS Frontend

A087350 a(n) = Sum_{k=0..n} (3*n)!/(3*k)!.

Table of values

List of values

A087350 a(n) = Sum_{k=0..n} (3n)!/(3k)!.