A378360 - cp's OEIS frontend

A378360 a(1) = 0, a(n) = Sum_{digits d in a(n-1)} (d+[d==0])*c(d,n-1) where c(d,k) = number of digits d in a(1..a(k)), with Iverson bracket.

n	a(n)
1	0
2	1
3	1
4	2
5	2
6	4
7	4
8	8
9	8
10	16
11	9
12	9
13	18
14	28
15	38
16	43
17	18
18	53
19	14
20	22
21	10
22	9
23	27
24	19
25	44
26	24
27	42
28	48
29	92
30	63
31	24
32	60
33	21
34	31
35	25
36	34
37	62
38	50
39	19
40	65
41	50
42	30
43	27
44	42
45	78
46	85
47	102
48	51
49	48
50	132
51	72
52	64
53	92
54	101
55	24
56	100
57	27
58	77
59	49
60	136
61	87
62	144
63	91
64	101
65	33
66	33
67	39

[0, 1, 1, 2, 2, 4, 4, 8, 8, 16, 9, 9, 18, 28, 38, 43, 18, 53, 14, 22, 10, 9, 27, 19, 44, 24, 42, 48, 92, 63, 24, 60, 21, 31, 25, 34, 62, 50, 19, 65, 50, 30, 27, 42, 78, 85, 102, 51, 48, 132, 72, 64, 92, 101, 24, 100, 27, 77, 49, 136, 87, 144, 91, 101, 33, 33, 39]

cp's OEIS Frontend

A378360 a(1) = 0, a(n) = Sum_{digits d in a(n-1)} (d+[d==0])*c(d,n-1) where c(d,k) = number of digits d in a(1..a(k)), with Iverson bracket.

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	2
5	2
6	4
7	4
8	8
9	8
10	16
11	9
12	9
13	18
14	28
15	38
16	43
17	18
18	53
19	14
20	22
21	10
22	9
23	27
24	19
25	44
26	24
27	42
28	48
29	92
30	63
31	24
32	60
33	21
34	31
35	25
36	34
37	62
38	50
39	19
40	65
41	50
42	30
43	27
44	42
45	78
46	85
47	102
48	51
49	48
50	132
51	72
52	64
53	92
54	101
55	24
56	100
57	27
58	77
59	49
60	136
61	87
62	144
63	91
64	101
65	33
66	33
67	39

n	a(n)
1	0
2	1
3	1
4	2
5	2
6	4
7	4
8	8
9	8
10	16
11	9
12	9
13	18
14	28
15	38
16	43
17	18
18	53
19	14
20	22
21	10
22	9
23	27
24	19
25	44
26	24
27	42
28	48
29	92
30	63
31	24
32	60
33	21
34	31
35	25
36	34
37	62
38	50
39	19
40	65
41	50
42	30
43	27
44	42
45	78
46	85
47	102
48	51
49	48
50	132
51	72
52	64
53	92
54	101
55	24
56	100
57	27
58	77
59	49
60	136
61	87
62	144
63	91
64	101
65	33
66	33
67	39

n	a(n)
1	0
2	1
3	1
4	2
5	2
6	4
7	4
8	8
9	8
10	16
11	9
12	9
13	18
14	28
15	38
16	43
17	18
18	53
19	14
20	22
21	10
22	9
23	27
24	19
25	44
26	24
27	42
28	48
29	92
30	63
31	24
32	60
33	21
34	31
35	25
36	34
37	62
38	50
39	19
40	65
41	50
42	30
43	27
44	42
45	78
46	85
47	102
48	51
49	48
50	132
51	72
52	64
53	92
54	101
55	24
56	100
57	27
58	77
59	49
60	136
61	87
62	144
63	91
64	101
65	33
66	33
67	39