A386837 - cp's OEIS frontend

A386837 a(n) = Sum_{k=0..n} binomial(4n+2,k) binomial(4*n-k-1,n-k).

n	a(n)
0	1
1	9
2	126
3	1978
4	32703
5	556887
6	9665476
7	170006256
8	3019802253
9	54047520709
10	973141183002
11	17607177876438
12	319855973830251
13	5830329608105763
14	106583422441886592
15	1953315343946213804
16	35875864591309216089
17	660185366847433991025
18	12169379986275311820790

[1, 9, 126, 1978, 32703, 556887, 9665476, 170006256, 3019802253, 54047520709, 973141183002, 17607177876438, 319855973830251, 5830329608105763, 106583422441886592, 1953315343946213804, 35875864591309216089, 660185366847433991025, 12169379986275311820790]

cp's OEIS Frontend

A386837 a(n) = Sum_{k=0..n} binomial(4n+2,k) binomial(4*n-k-1,n-k).

Table of values

List of values

cp's OEIS Frontend

A386837 a(n) = Sum_{k=0..n} binomial(4*n+2,k) * binomial(4*n-k-1,n-k).

Table of values

List of values

A386837 a(n) = Sum_{k=0..n} binomial(4n+2,k) binomial(4*n-k-1,n-k).