A129913 - cp's OEIS frontend

A129913 a(n) is the number of ways of producing n, with an expression like: +- 1 # 2 # 3 # 4 # 5 # 6 # 7 # 8 # 9, where each # is replaced by any one of +,-,*,/; and the value is computed going left to right.

n	a(n)
0	694
1	299
2	143
3	171
4	156
5	156
6	183
7	155
8	167
9	434
10	160
11	140
12	129
13	111
14	89
15	147
16	114
17	201
18	171
19	94
20	87
21	90
22	68
23	95
24	130
25	130
26	44
27	120
28	41
29	72
30	76
31	72
32	50
33	81
34	50
35	53
36	137
37	49
38	46
39	78
40	41
41	75
42	36
43	61
44	28
45	123
46	35
47	86
48	47
49	40
50	40
51	47
52	40
53	37
54	109
55	61
56	32
57	58
58	23
59	53

[694, 299, 143, 171, 156, 156, 183, 155, 167, 434, 160, 140, 129, 111, 89, 147, 114, 201, 171, 94, 87, 90, 68, 95, 130, 130, 44, 120, 41, 72, 76, 72, 50, 81, 50, 53, 137, 49, 46, 78, 41, 75, 36, 61, 28, 123, 35, 86, 47, 40, 40, 47, 40, 37, 109, 61, 32, 58, 23, 53]

cp's OEIS Frontend

A129913 a(n) is the number of ways of producing n, with an expression like: +- 1 # 2 # 3 # 4 # 5 # 6 # 7 # 8 # 9, where each # is replaced by any one of +,-,*,/; and the value is computed going left to right.

Table of values

List of values

n	a(n)
0	694
1	299
2	143
3	171
4	156
5	156
6	183
7	155
8	167
9	434
10	160
11	140
12	129
13	111
14	89
15	147
16	114
17	201
18	171
19	94
20	87
21	90
22	68
23	95
24	130
25	130
26	44
27	120
28	41
29	72
30	76
31	72
32	50
33	81
34	50
35	53
36	137
37	49
38	46
39	78
40	41
41	75
42	36
43	61
44	28
45	123
46	35
47	86
48	47
49	40
50	40
51	47
52	40
53	37
54	109
55	61
56	32
57	58
58	23
59	53

n	a(n)
0	694
1	299
2	143
3	171
4	156
5	156
6	183
7	155
8	167
9	434
10	160
11	140
12	129
13	111
14	89
15	147
16	114
17	201
18	171
19	94
20	87
21	90
22	68
23	95
24	130
25	130
26	44
27	120
28	41
29	72
30	76
31	72
32	50
33	81
34	50
35	53
36	137
37	49
38	46
39	78
40	41
41	75
42	36
43	61
44	28
45	123
46	35
47	86
48	47
49	40
50	40
51	47
52	40
53	37
54	109
55	61
56	32
57	58
58	23
59	53

n	a(n)
0	694
1	299
2	143
3	171
4	156
5	156
6	183
7	155
8	167
9	434
10	160
11	140
12	129
13	111
14	89
15	147
16	114
17	201
18	171
19	94
20	87
21	90
22	68
23	95
24	130
25	130
26	44
27	120
28	41
29	72
30	76
31	72
32	50
33	81
34	50
35	53
36	137
37	49
38	46
39	78
40	41
41	75
42	36
43	61
44	28
45	123
46	35
47	86
48	47
49	40
50	40
51	47
52	40
53	37
54	109
55	61
56	32
57	58
58	23
59	53