A380225 - cp's OEIS frontend

A380225 Numbers k > 0 such that both |b(k) - b(k-1)| and |b(k+1) - b(k)| are greater than 1, where b is A377091.

n	a(n)
1	21
2	32
3	43
4	52
5	74
6	91
7	112
8	133
9	147
10	161
11	162
12	184
13	211
14	212
15	242
16	243
17	273
18	308
19	343
20	381
21	422
22	463
23	464
24	508
25	509
26	553
27	554
28	602
29	651
30	652
31	653
32	678
33	704
34	758
35	759
36	760
37	761
38	813
39	814
40	815
41	816
42	820
43	821
44	822
45	828
46	872
47	873
48	931
49	932
50	938
51	966
52	998

[21, 32, 43, 52, 74, 91, 112, 133, 147, 161, 162, 184, 211, 212, 242, 243, 273, 308, 343, 381, 422, 463, 464, 508, 509, 553, 554, 602, 651, 652, 653, 678, 704, 758, 759, 760, 761, 813, 814, 815, 816, 820, 821, 822, 828, 872, 873, 931, 932, 938, 966, 998]

cp's OEIS Frontend

A380225 Numbers k > 0 such that both |b(k) - b(k-1)| and |b(k+1) - b(k)| are greater than 1, where b is A377091.

Table of values

List of values

n	a(n)
1	21
2	32
3	43
4	52
5	74
6	91
7	112
8	133
9	147
10	161
11	162
12	184
13	211
14	212
15	242
16	243
17	273
18	308
19	343
20	381
21	422
22	463
23	464
24	508
25	509
26	553
27	554
28	602
29	651
30	652
31	653
32	678
33	704
34	758
35	759
36	760
37	761
38	813
39	814
40	815
41	816
42	820
43	821
44	822
45	828
46	872
47	873
48	931
49	932
50	938
51	966
52	998

n	a(n)
1	21
2	32
3	43
4	52
5	74
6	91
7	112
8	133
9	147
10	161
11	162
12	184
13	211
14	212
15	242
16	243
17	273
18	308
19	343
20	381
21	422
22	463
23	464
24	508
25	509
26	553
27	554
28	602
29	651
30	652
31	653
32	678
33	704
34	758
35	759
36	760
37	761
38	813
39	814
40	815
41	816
42	820
43	821
44	822
45	828
46	872
47	873
48	931
49	932
50	938
51	966
52	998

n	a(n)
1	21
2	32
3	43
4	52
5	74
6	91
7	112
8	133
9	147
10	161
11	162
12	184
13	211
14	212
15	242
16	243
17	273
18	308
19	343
20	381
21	422
22	463
23	464
24	508
25	509
26	553
27	554
28	602
29	651
30	652
31	653
32	678
33	704
34	758
35	759
36	760
37	761
38	813
39	814
40	815
41	816
42	820
43	821
44	822
45	828
46	872
47	873
48	931
49	932
50	938
51	966
52	998