A265388 - cp's OEIS frontend

A265388 a(n) = gcd{k=1..n-1} binomial(2n, 2k), a(1) = 0.

n	a(n)
1	0
2	6
3	15
4	14
5	15
6	33
7	91
8	2
9	51
10	19
11	11
12	23
13	65
14	3
15	435
16	62
17	17
18	3
19	703
20	1
21	41
22	43
23	23
24	47
25	35
26	1
27	159
28	7
29	29
30	59
31	1891
32	2
33	1
34	67
35	1
36	71
37	2701
38	1
39	1
40	79
41	123
42	249
43	43
44	1
45	267
46	1
47	47
48	1
49	679
50	1
51	101
52	103
53	53
54	321
55	109
56	1
57	113
58	1
59	59
60	1
61	671
62	1
63	5
64	254
65	5
66	1441

[0, 6, 15, 14, 15, 33, 91, 2, 51, 19, 11, 23, 65, 3, 435, 62, 17, 3, 703, 1, 41, 43, 23, 47, 35, 1, 159, 7, 29, 59, 1891, 2, 1, 67, 1, 71, 2701, 1, 1, 79, 123, 249, 43, 1, 267, 1, 47, 1, 679, 1, 101, 103, 53, 321, 109, 1, 113, 1, 59, 1, 671, 1, 5, 254, 5, 1441]

cp's OEIS Frontend

A265388 a(n) = gcd{k=1..n-1} binomial(2n, 2k), a(1) = 0.

Table of values

List of values

cp's OEIS Frontend

A265388 a(n) = gcd{k=1..n-1} binomial(2*n, 2*k), a(1) = 0.

Table of values

List of values

A265388 a(n) = gcd{k=1..n-1} binomial(2n, 2k), a(1) = 0.