A217253 - cp's OEIS frontend

A217253 Number of minimal length formulas representing n only using addition, multiplication, exponentiation and the constant 1.

n	a(n)
1	1
2	1
3	2
4	7
5	18
6	4
7	8
8	2
9	2
10	4
11	12
12	36
13	72
14	16
15	72
16	14
17	28
18	4
19	8
20	8
21	48
22	24
23	48
24	8
25	18
26	36
27	4
28	8
29	24
30	96
31	328
32	18
33	36
34	164
35	472
36	4
37	8
38	24
39	80
40	144
41	288
42	224
43	560
44	216
45	72
46	144
47	432
48	56
49	8
50	52
51	232
52	72
53	144
54	8
55	16
56	16
57	32
58	48
59	96
60	256
61	512
62	656
63	32
64	20
65	40
66	120

[1, 1, 2, 7, 18, 4, 8, 2, 2, 4, 12, 36, 72, 16, 72, 14, 28, 4, 8, 8, 48, 24, 48, 8, 18, 36, 4, 8, 24, 96, 328, 18, 36, 164, 472, 4, 8, 24, 80, 144, 288, 224, 560, 216, 72, 144, 432, 56, 8, 52, 232, 72, 144, 8, 16, 16, 32, 48, 96, 256, 512, 656, 32, 20, 40, 120]

cp's OEIS Frontend

A217253 Number of minimal length formulas representing n only using addition, multiplication, exponentiation and the constant 1.

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	7
5	18
6	4
7	8
8	2
9	2
10	4
11	12
12	36
13	72
14	16
15	72
16	14
17	28
18	4
19	8
20	8
21	48
22	24
23	48
24	8
25	18
26	36
27	4
28	8
29	24
30	96
31	328
32	18
33	36
34	164
35	472
36	4
37	8
38	24
39	80
40	144
41	288
42	224
43	560
44	216
45	72
46	144
47	432
48	56
49	8
50	52
51	232
52	72
53	144
54	8
55	16
56	16
57	32
58	48
59	96
60	256
61	512
62	656
63	32
64	20
65	40
66	120

n	a(n)
1	1
2	1
3	2
4	7
5	18
6	4
7	8
8	2
9	2
10	4
11	12
12	36
13	72
14	16
15	72
16	14
17	28
18	4
19	8
20	8
21	48
22	24
23	48
24	8
25	18
26	36
27	4
28	8
29	24
30	96
31	328
32	18
33	36
34	164
35	472
36	4
37	8
38	24
39	80
40	144
41	288
42	224
43	560
44	216
45	72
46	144
47	432
48	56
49	8
50	52
51	232
52	72
53	144
54	8
55	16
56	16
57	32
58	48
59	96
60	256
61	512
62	656
63	32
64	20
65	40
66	120

n	a(n)
1	1
2	1
3	2
4	7
5	18
6	4
7	8
8	2
9	2
10	4
11	12
12	36
13	72
14	16
15	72
16	14
17	28
18	4
19	8
20	8
21	48
22	24
23	48
24	8
25	18
26	36
27	4
28	8
29	24
30	96
31	328
32	18
33	36
34	164
35	472
36	4
37	8
38	24
39	80
40	144
41	288
42	224
43	560
44	216
45	72
46	144
47	432
48	56
49	8
50	52
51	232
52	72
53	144
54	8
55	16
56	16
57	32
58	48
59	96
60	256
61	512
62	656
63	32
64	20
65	40
66	120