A037980 - cp's OEIS frontend

A037980 a(n) = (1/16)( binomial(4n, 2n) - (-1)^nbinomial(2n, n) + (1-(-1)^n)binomial(2*n, n)^2 ).

n	a(n)
0	0
1	1
2	4
3	109
4	800
5	19501
6	168952
7	3979830
8	37566720
9	862687045
10	8615396504
11	193710517650
12	2015475061184
13	44516469004294
14	478043160040240
15	10399216983867484
16	114539008771344384
17	2459029841101222485
18	27657033766735102744
19	586949749681986718650
20	6719200545824895620800
21	141147097812860184921810

[0, 1, 4, 109, 800, 19501, 168952, 3979830, 37566720, 862687045, 8615396504, 193710517650, 2015475061184, 44516469004294, 478043160040240, 10399216983867484, 114539008771344384, 2459029841101222485, 27657033766735102744, 586949749681986718650, 6719200545824895620800, 141147097812860184921810]

cp's OEIS Frontend

A037980 a(n) = (1/16)( binomial(4n, 2n) - (-1)^nbinomial(2n, n) + (1-(-1)^n)binomial(2*n, n)^2 ).

Table of values

List of values

cp's OEIS Frontend

A037980 a(n) = (1/16)*( binomial(4*n, 2*n) - (-1)^n*binomial(2*n, n) + (1-(-1)^n)*binomial(2*n, n)^2 ).

Table of values

List of values

A037980 a(n) = (1/16)( binomial(4n, 2n) - (-1)^nbinomial(2n, n) + (1-(-1)^n)binomial(2*n, n)^2 ).