A281943 - cp's OEIS frontend

A281943 Nonnegative numbers whose digits can be formed by typing adjacent keys on a 789-456-123-00X keypad without repeating a digit.

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	5
7	6
8	7
9	8
10	9
11	10
12	12
13	14
14	20
15	21
16	23
17	25
18	32
19	36
20	41
21	45
22	47
23	52
24	54
25	56
26	58
27	63
28	65
29	69
30	74
31	78
32	85
33	87
34	89
35	96
36	98
37	102
38	120
39	123
40	125
41	145
42	147
43	201
44	210
45	214
46	236
47	254
48	256
49	258
50	320
51	321
52	325
53	365
54	369
55	410
56	412
57	452
58	456
59	458
60	478
61	520
62	521
63	523
64	541
65	547
66	563
67	569
68	587

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 20, 21, 23, 25, 32, 36, 41, 45, 47, 52, 54, 56, 58, 63, 65, 69, 74, 78, 85, 87, 89, 96, 98, 102, 120, 123, 125, 145, 147, 201, 210, 214, 236, 254, 256, 258, 320, 321, 325, 365, 369, 410, 412, 452, 456, 458, 478, 520, 521, 523, 541, 547, 563, 569, 587]

cp's OEIS Frontend

A281943 Nonnegative numbers whose digits can be formed by typing adjacent keys on a 789-456-123-00X keypad without repeating a digit.

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	5
7	6
8	7
9	8
10	9
11	10
12	12
13	14
14	20
15	21
16	23
17	25
18	32
19	36
20	41
21	45
22	47
23	52
24	54
25	56
26	58
27	63
28	65
29	69
30	74
31	78
32	85
33	87
34	89
35	96
36	98
37	102
38	120
39	123
40	125
41	145
42	147
43	201
44	210
45	214
46	236
47	254
48	256
49	258
50	320
51	321
52	325
53	365
54	369
55	410
56	412
57	452
58	456
59	458
60	478
61	520
62	521
63	523
64	541
65	547
66	563
67	569
68	587

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	5
7	6
8	7
9	8
10	9
11	10
12	12
13	14
14	20
15	21
16	23
17	25
18	32
19	36
20	41
21	45
22	47
23	52
24	54
25	56
26	58
27	63
28	65
29	69
30	74
31	78
32	85
33	87
34	89
35	96
36	98
37	102
38	120
39	123
40	125
41	145
42	147
43	201
44	210
45	214
46	236
47	254
48	256
49	258
50	320
51	321
52	325
53	365
54	369
55	410
56	412
57	452
58	456
59	458
60	478
61	520
62	521
63	523
64	541
65	547
66	563
67	569
68	587

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	5
7	6
8	7
9	8
10	9
11	10
12	12
13	14
14	20
15	21
16	23
17	25
18	32
19	36
20	41
21	45
22	47
23	52
24	54
25	56
26	58
27	63
28	65
29	69
30	74
31	78
32	85
33	87
34	89
35	96
36	98
37	102
38	120
39	123
40	125
41	145
42	147
43	201
44	210
45	214
46	236
47	254
48	256
49	258
50	320
51	321
52	325
53	365
54	369
55	410
56	412
57	452
58	456
59	458
60	478
61	520
62	521
63	523
64	541
65	547
66	563
67	569
68	587