A379084 - cp's OEIS frontend

A379084 a(n) = Sum_{k=0..floor(n/2)} binomial(2n+k-1,k) binomial(2n+k,n-2k).

n	a(n)
0	1
1	2
2	10
3	62
4	394
5	2562
6	16966
7	113794
8	770458
9	5254658
10	36046470
11	248449104
12	1719175846
13	11935608518
14	83100064834
15	579994824042
16	4056746450106
17	28428354905268
18	199550820571858
19	1402832286126650
20	9875127071717694
21	69599814539512900
22	491081313666879968
23	3468458841769675496

[1, 2, 10, 62, 394, 2562, 16966, 113794, 770458, 5254658, 36046470, 248449104, 1719175846, 11935608518, 83100064834, 579994824042, 4056746450106, 28428354905268, 199550820571858, 1402832286126650, 9875127071717694, 69599814539512900, 491081313666879968, 3468458841769675496]

cp's OEIS Frontend

A379084 a(n) = Sum_{k=0..floor(n/2)} binomial(2n+k-1,k) binomial(2n+k,n-2k).

Table of values

List of values

cp's OEIS Frontend

A379084 a(n) = Sum_{k=0..floor(n/2)} binomial(2*n+k-1,k) * binomial(2*n+k,n-2*k).

Table of values

List of values

A379084 a(n) = Sum_{k=0..floor(n/2)} binomial(2n+k-1,k) binomial(2n+k,n-2k).