A276986 - cp's OEIS frontend

A276986 Numbers n for which there is a permutation p of (1,2,3,...,n) such that k+p(k) is a Catalan number for 1<=k<=n.

n	a(n)
1	0
2	1
3	3
4	4
5	9
6	10
7	12
8	13
9	28
10	29
11	31
12	32
13	37
14	38
15	40
16	41
17	90
18	91
19	93
20	94
21	99
22	100
23	102
24	103
25	118
26	119
27	121
28	122
29	127
30	128
31	130
32	131
33	297
34	298
35	300
36	301
37	306
38	307
39	309
40	310
41	325
42	326
43	328
44	329
45	334
46	335
47	337
48	338
49	387
50	388
51	390
52	391
53	396
54	397
55	399
56	400
57	415
58	416

[0, 1, 3, 4, 9, 10, 12, 13, 28, 29, 31, 32, 37, 38, 40, 41, 90, 91, 93, 94, 99, 100, 102, 103, 118, 119, 121, 122, 127, 128, 130, 131, 297, 298, 300, 301, 306, 307, 309, 310, 325, 326, 328, 329, 334, 335, 337, 338, 387, 388, 390, 391, 396, 397, 399, 400, 415, 416]

cp's OEIS Frontend

A276986 Numbers n for which there is a permutation p of (1,2,3,...,n) such that k+p(k) is a Catalan number for 1<=k<=n.

Table of values

List of values

n	a(n)
1	0
2	1
3	3
4	4
5	9
6	10
7	12
8	13
9	28
10	29
11	31
12	32
13	37
14	38
15	40
16	41
17	90
18	91
19	93
20	94
21	99
22	100
23	102
24	103
25	118
26	119
27	121
28	122
29	127
30	128
31	130
32	131
33	297
34	298
35	300
36	301
37	306
38	307
39	309
40	310
41	325
42	326
43	328
44	329
45	334
46	335
47	337
48	338
49	387
50	388
51	390
52	391
53	396
54	397
55	399
56	400
57	415
58	416

n	a(n)
1	0
2	1
3	3
4	4
5	9
6	10
7	12
8	13
9	28
10	29
11	31
12	32
13	37
14	38
15	40
16	41
17	90
18	91
19	93
20	94
21	99
22	100
23	102
24	103
25	118
26	119
27	121
28	122
29	127
30	128
31	130
32	131
33	297
34	298
35	300
36	301
37	306
38	307
39	309
40	310
41	325
42	326
43	328
44	329
45	334
46	335
47	337
48	338
49	387
50	388
51	390
52	391
53	396
54	397
55	399
56	400
57	415
58	416

n	a(n)
1	0
2	1
3	3
4	4
5	9
6	10
7	12
8	13
9	28
10	29
11	31
12	32
13	37
14	38
15	40
16	41
17	90
18	91
19	93
20	94
21	99
22	100
23	102
24	103
25	118
26	119
27	121
28	122
29	127
30	128
31	130
32	131
33	297
34	298
35	300
36	301
37	306
38	307
39	309
40	310
41	325
42	326
43	328
44	329
45	334
46	335
47	337
48	338
49	387
50	388
51	390
52	391
53	396
54	397
55	399
56	400
57	415
58	416