A379085 - cp's OEIS frontend

A379085 a(n) = Sum_{k=0..floor(n/3)} binomial(2n+k-1,k) binomial(2n+k,n-3k).

n	a(n)
0	1
1	2
2	6
3	26
4	142
5	802
6	4434
7	24222
8	132686
9	733076
10	4081926
11	22853052
12	128427106
13	723862856
14	4090573570
15	23170106086
16	131515806574
17	747875338152
18	4259810283828
19	24298797944956
20	138787172202182
21	793651842511512
22	4543393775520936
23	26035130683198684
24	149325002408646002

[1, 2, 6, 26, 142, 802, 4434, 24222, 132686, 733076, 4081926, 22853052, 128427106, 723862856, 4090573570, 23170106086, 131515806574, 747875338152, 4259810283828, 24298797944956, 138787172202182, 793651842511512, 4543393775520936, 26035130683198684, 149325002408646002]

cp's OEIS Frontend

A379085 a(n) = Sum_{k=0..floor(n/3)} binomial(2n+k-1,k) binomial(2n+k,n-3k).

Table of values

List of values

cp's OEIS Frontend

A379085 a(n) = Sum_{k=0..floor(n/3)} binomial(2*n+k-1,k) * binomial(2*n+k,n-3*k).

Table of values

List of values

A379085 a(n) = Sum_{k=0..floor(n/3)} binomial(2n+k-1,k) binomial(2n+k,n-3k).