A004677 - cp's OEIS frontend

A004677 Numerator of 2^n(3n-3)!/( ((n-1)!)^3 * (2*n)! ).

n	a(n)
1	1
2	1
3	1
4	2
5	11
6	91
7	17
8	323
9	4807
10	3289
11	8671
12	11687
13	15283
14	10743949
15	15189721
16	21069613
17	1339779509
18	1339779509
19	101007559
20	101007559
21	4215217889
22	185371558793
23	8059632991
24	11489264051
25	815737747621
26	2203307656324321
27	41571842572157
28	3284175563200403

[1, 1, 1, 2, 11, 91, 17, 323, 4807, 3289, 8671, 11687, 15283, 10743949, 15189721, 21069613, 1339779509, 1339779509, 101007559, 101007559, 4215217889, 185371558793, 8059632991, 11489264051, 815737747621, 2203307656324321, 41571842572157, 3284175563200403]

cp's OEIS Frontend

A004677 Numerator of 2^n(3n-3)!/( ((n-1)!)^3 * (2*n)! ).

Table of values

List of values

cp's OEIS Frontend

A004677 Numerator of 2^n*(3*n-3)!/( ((n-1)!)^3 * (2*n)! ).

Table of values

List of values

A004677 Numerator of 2^n(3n-3)!/( ((n-1)!)^3 * (2*n)! ).