A002503 - cp's OEIS frontend

A002503 Numbers k such that binomial(2*k,k) is divisible by (k+1)^2.

n	a(n)
1	5
2	14
3	27
4	41
5	44
6	65
7	76
8	90
9	109
10	125
11	139
12	152
13	155
14	169
15	186
16	189
17	203
18	208
19	209
20	219
21	227
22	230
23	237
24	265
25	275
26	298
27	307
28	311
29	314
30	321
31	324
32	329
33	344
34	377
35	413
36	419
37	428
38	434
39	439
40	441
41	449
42	458
43	459
44	467
45	475

[5, 14, 27, 41, 44, 65, 76, 90, 109, 125, 139, 152, 155, 169, 186, 189, 203, 208, 209, 219, 227, 230, 237, 265, 275, 298, 307, 311, 314, 321, 324, 329, 344, 377, 413, 419, 428, 434, 439, 441, 449, 458, 459, 467, 475]

cp's OEIS Frontend

A002503 Numbers k such that binomial(2*k,k) is divisible by (k+1)^2.

Table of values

List of values

n	a(n)
1	5
2	14
3	27
4	41
5	44
6	65
7	76
8	90
9	109
10	125
11	139
12	152
13	155
14	169
15	186
16	189
17	203
18	208
19	209
20	219
21	227
22	230
23	237
24	265
25	275
26	298
27	307
28	311
29	314
30	321
31	324
32	329
33	344
34	377
35	413
36	419
37	428
38	434
39	439
40	441
41	449
42	458
43	459
44	467
45	475

n	a(n)
1	5
2	14
3	27
4	41
5	44
6	65
7	76
8	90
9	109
10	125
11	139
12	152
13	155
14	169
15	186
16	189
17	203
18	208
19	209
20	219
21	227
22	230
23	237
24	265
25	275
26	298
27	307
28	311
29	314
30	321
31	324
32	329
33	344
34	377
35	413
36	419
37	428
38	434
39	439
40	441
41	449
42	458
43	459
44	467
45	475

n	a(n)
1	5
2	14
3	27
4	41
5	44
6	65
7	76
8	90
9	109
10	125
11	139
12	152
13	155
14	169
15	186
16	189
17	203
18	208
19	209
20	219
21	227
22	230
23	237
24	265
25	275
26	298
27	307
28	311
29	314
30	321
31	324
32	329
33	344
34	377
35	413
36	419
37	428
38	434
39	439
40	441
41	449
42	458
43	459
44	467
45	475