A334387 - cp's OEIS frontend

A334387 The difference version of the 'Decade transform' : to obtain a(n) write n as a sum of its power-of-ten parts and then continue to calculate the absolute value of the difference between the adjacent parts until a single number remains.

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	9
12	8
13	7
14	6
15	5
16	4
17	3
18	2
19	1
20	20
21	19
22	18
23	17
24	16
25	15
26	14
27	13
28	12
29	11
30	30
31	29
32	28
33	27
34	26
35	25
36	24
37	23
38	22
39	21
40	40
41	39
42	38
43	37
44	36
45	35
46	34
47	33
48	32
49	31
50	50
51	49
52	48
53	47
54	46
55	45
56	44
57	43
58	42
59	41
60	60
61	59
62	58
63	57
64	56
65	55
66	54
67	53
68	52
69	51
70	70
71	69
72	68

[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 40, 39, 38, 37, 36, 35, 34, 33, 32, 31, 50, 49, 48, 47, 46, 45, 44, 43, 42, 41, 60, 59, 58, 57, 56, 55, 54, 53, 52, 51, 70, 69, 68]

cp's OEIS Frontend

A334387 The difference version of the 'Decade transform' : to obtain a(n) write n as a sum of its power-of-ten parts and then continue to calculate the absolute value of the difference between the adjacent parts until a single number remains.

Table of values

List of values

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	9
12	8
13	7
14	6
15	5
16	4
17	3
18	2
19	1
20	20
21	19
22	18
23	17
24	16
25	15
26	14
27	13
28	12
29	11
30	30
31	29
32	28
33	27
34	26
35	25
36	24
37	23
38	22
39	21
40	40
41	39
42	38
43	37
44	36
45	35
46	34
47	33
48	32
49	31
50	50
51	49
52	48
53	47
54	46
55	45
56	44
57	43
58	42
59	41
60	60
61	59
62	58
63	57
64	56
65	55
66	54
67	53
68	52
69	51
70	70
71	69
72	68

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	9
12	8
13	7
14	6
15	5
16	4
17	3
18	2
19	1
20	20
21	19
22	18
23	17
24	16
25	15
26	14
27	13
28	12
29	11
30	30
31	29
32	28
33	27
34	26
35	25
36	24
37	23
38	22
39	21
40	40
41	39
42	38
43	37
44	36
45	35
46	34
47	33
48	32
49	31
50	50
51	49
52	48
53	47
54	46
55	45
56	44
57	43
58	42
59	41
60	60
61	59
62	58
63	57
64	56
65	55
66	54
67	53
68	52
69	51
70	70
71	69
72	68

n	a(n)
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	9
12	8
13	7
14	6
15	5
16	4
17	3
18	2
19	1
20	20
21	19
22	18
23	17
24	16
25	15
26	14
27	13
28	12
29	11
30	30
31	29
32	28
33	27
34	26
35	25
36	24
37	23
38	22
39	21
40	40
41	39
42	38
43	37
44	36
45	35
46	34
47	33
48	32
49	31
50	50
51	49
52	48
53	47
54	46
55	45
56	44
57	43
58	42
59	41
60	60
61	59
62	58
63	57
64	56
65	55
66	54
67	53
68	52
69	51
70	70
71	69
72	68