A378071 - cp's OEIS frontend

A378071 a(n) = denominator((4^(2n+1)n!^2)/((2n+3)(2*n)!)).

n	a(n)
0	3
1	5
2	21
3	45
4	385
5	819
6	3465
7	7293
8	122265
9	255255
10	1062347
11	2204475
12	18253053
13	37702175
14	155451825
15	319929885
16	10518906825
17	21585857535
18	88482569175
19	181144476975
20	1481850184815
21	3027700543725
22	12361581411855
23	25214881603275
24	411156946959525
25	837470267650107

[3, 5, 21, 45, 385, 819, 3465, 7293, 122265, 255255, 1062347, 2204475, 18253053, 37702175, 155451825, 319929885, 10518906825, 21585857535, 88482569175, 181144476975, 1481850184815, 3027700543725, 12361581411855, 25214881603275, 411156946959525, 837470267650107]

cp's OEIS Frontend

A378071 a(n) = denominator((4^(2n+1)n!^2)/((2n+3)(2*n)!)).

Table of values

List of values

cp's OEIS Frontend

A378071 a(n) = denominator((4^(2*n+1)*n!^2)/((2*n+3)*(2*n)!)).

Table of values

List of values

A378071 a(n) = denominator((4^(2n+1)n!^2)/((2n+3)(2*n)!)).