A249182 - cp's OEIS frontend

A249182 Proceed counterclockwise on the outer keys of a numeric keypad (i.e., 1,2,3,6,9,8,7,4): first single digits, then concatenate two digits, then three, etc.

n	a(n)
1	1
2	2
3	3
4	6
5	9
6	8
7	7
8	4
9	12
10	23
11	36
12	69
13	98
14	87
15	74
16	41
17	123
18	236
19	369
20	698
21	987
22	874
23	741
24	412
25	1236
26	2369
27	3698
28	6987
29	9874
30	8741
31	7412
32	4123
33	12369
34	23698
35	36987
36	69874
37	98741
38	87412
39	74123
40	41236
41	123698
42	236987
43	369874
44	698741
45	987412
46	874123
47	741236
48	412369

[1, 2, 3, 6, 9, 8, 7, 4, 12, 23, 36, 69, 98, 87, 74, 41, 123, 236, 369, 698, 987, 874, 741, 412, 1236, 2369, 3698, 6987, 9874, 8741, 7412, 4123, 12369, 23698, 36987, 69874, 98741, 87412, 74123, 41236, 123698, 236987, 369874, 698741, 987412, 874123, 741236, 412369]

cp's OEIS Frontend

A249182 Proceed counterclockwise on the outer keys of a numeric keypad (i.e., 1,2,3,6,9,8,7,4): first single digits, then concatenate two digits, then three, etc.

Table of values

List of values