A120624 - cp's OEIS frontend

A120624 Numbers n such that the n-th Catalan number C(2n,n)/(n+1) is divisible by 2n.

n	a(n)
1	6
2	28
3	42
4	45
5	66
6	77
7	91
8	110
9	126
10	140
11	153
12	156
13	170
14	187
15	190
16	204
17	209
18	210
19	220
20	228
21	231
22	238
23	266
24	276
25	299
26	308
27	312
28	315
29	322
30	325
31	330
32	345
33	378
34	414
35	420
36	429
37	435
38	440
39	442
40	450
41	459
42	460
43	468
44	476
45	483
46	493
47	496
48	510
49	527
50	551
51	558
52	561
53	570

[6, 28, 42, 45, 66, 77, 91, 110, 126, 140, 153, 156, 170, 187, 190, 204, 209, 210, 220, 228, 231, 238, 266, 276, 299, 308, 312, 315, 322, 325, 330, 345, 378, 414, 420, 429, 435, 440, 442, 450, 459, 460, 468, 476, 483, 493, 496, 510, 527, 551, 558, 561, 570]

cp's OEIS Frontend

A120624 Numbers n such that the n-th Catalan number C(2n,n)/(n+1) is divisible by 2n.

Table of values

List of values

n	a(n)
1	6
2	28
3	42
4	45
5	66
6	77
7	91
8	110
9	126
10	140
11	153
12	156
13	170
14	187
15	190
16	204
17	209
18	210
19	220
20	228
21	231
22	238
23	266
24	276
25	299
26	308
27	312
28	315
29	322
30	325
31	330
32	345
33	378
34	414
35	420
36	429
37	435
38	440
39	442
40	450
41	459
42	460
43	468
44	476
45	483
46	493
47	496
48	510
49	527
50	551
51	558
52	561
53	570

n	a(n)
1	6
2	28
3	42
4	45
5	66
6	77
7	91
8	110
9	126
10	140
11	153
12	156
13	170
14	187
15	190
16	204
17	209
18	210
19	220
20	228
21	231
22	238
23	266
24	276
25	299
26	308
27	312
28	315
29	322
30	325
31	330
32	345
33	378
34	414
35	420
36	429
37	435
38	440
39	442
40	450
41	459
42	460
43	468
44	476
45	483
46	493
47	496
48	510
49	527
50	551
51	558
52	561
53	570

n	a(n)
1	6
2	28
3	42
4	45
5	66
6	77
7	91
8	110
9	126
10	140
11	153
12	156
13	170
14	187
15	190
16	204
17	209
18	210
19	220
20	228
21	231
22	238
23	266
24	276
25	299
26	308
27	312
28	315
29	322
30	325
31	330
32	345
33	378
34	414
35	420
36	429
37	435
38	440
39	442
40	450
41	459
42	460
43	468
44	476
45	483
46	493
47	496
48	510
49	527
50	551
51	558
52	561
53	570