A378462 - cp's OEIS frontend

A378462 a(n) = Sum_{k=0..floor(n/2)} binomial(n+k-1,k) * binomial(2n+k-1,n-2k).

n	a(n)
0	1
1	1
2	5
3	28
4	157
5	891
6	5126
7	29814
8	174869
9	1032481
10	6128795
11	36541220
12	218672950
13	1312712519
14	7901609196
15	47673716238
16	288226881669
17	1745734656930
18	10590673033931
19	64342403492274
20	391414638274987
21	2383907483199039
22	14534764399148966
23	88705912126094358

[1, 1, 5, 28, 157, 891, 5126, 29814, 174869, 1032481, 6128795, 36541220, 218672950, 1312712519, 7901609196, 47673716238, 288226881669, 1745734656930, 10590673033931, 64342403492274, 391414638274987, 2383907483199039, 14534764399148966, 88705912126094358]

cp's OEIS Frontend

A378462 a(n) = Sum_{k=0..floor(n/2)} binomial(n+k-1,k) * binomial(2n+k-1,n-2k).

Table of values

List of values

cp's OEIS Frontend

A378462 a(n) = Sum_{k=0..floor(n/2)} binomial(n+k-1,k) * binomial(2*n+k-1,n-2*k).

Table of values

List of values

A378462 a(n) = Sum_{k=0..floor(n/2)} binomial(n+k-1,k) * binomial(2n+k-1,n-2k).