A361922 - cp's OEIS frontend

A361922 Infinitary phi-practical numbers: numbers m such that each k <= m is a subsum of a the multiset {iphi(d) : d infinitary divisor of m}, where iphi is an infinitary analog of Euler's phi function (A091732).

n	a(n)
1	1
2	2
3	3
4	6
5	8
6	12
7	15
8	24
9	30
10	40
11	42
12	56
13	60
14	72
15	84
16	105
17	108
18	120
19	132
20	135
21	156
22	165
23	168
24	195
25	210
26	216
27	240
28	255
29	264
30	270
31	280
32	312
33	330
34	360
35	378
36	384
37	390
38	408
39	420
40	440
41	456
42	462
43	480
44	504
45	510
46	520
47	540
48	546
49	552
50	570
51	600
52	616
53	640
54	660
55	672
56	680
57	690

[1, 2, 3, 6, 8, 12, 15, 24, 30, 40, 42, 56, 60, 72, 84, 105, 108, 120, 132, 135, 156, 165, 168, 195, 210, 216, 240, 255, 264, 270, 280, 312, 330, 360, 378, 384, 390, 408, 420, 440, 456, 462, 480, 504, 510, 520, 540, 546, 552, 570, 600, 616, 640, 660, 672, 680, 690]

cp's OEIS Frontend

A361922 Infinitary phi-practical numbers: numbers m such that each k <= m is a subsum of a the multiset {iphi(d) : d infinitary divisor of m}, where iphi is an infinitary analog of Euler's phi function (A091732).

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	6
5	8
6	12
7	15
8	24
9	30
10	40
11	42
12	56
13	60
14	72
15	84
16	105
17	108
18	120
19	132
20	135
21	156
22	165
23	168
24	195
25	210
26	216
27	240
28	255
29	264
30	270
31	280
32	312
33	330
34	360
35	378
36	384
37	390
38	408
39	420
40	440
41	456
42	462
43	480
44	504
45	510
46	520
47	540
48	546
49	552
50	570
51	600
52	616
53	640
54	660
55	672
56	680
57	690

n	a(n)
1	1
2	2
3	3
4	6
5	8
6	12
7	15
8	24
9	30
10	40
11	42
12	56
13	60
14	72
15	84
16	105
17	108
18	120
19	132
20	135
21	156
22	165
23	168
24	195
25	210
26	216
27	240
28	255
29	264
30	270
31	280
32	312
33	330
34	360
35	378
36	384
37	390
38	408
39	420
40	440
41	456
42	462
43	480
44	504
45	510
46	520
47	540
48	546
49	552
50	570
51	600
52	616
53	640
54	660
55	672
56	680
57	690

n	a(n)
1	1
2	2
3	3
4	6
5	8
6	12
7	15
8	24
9	30
10	40
11	42
12	56
13	60
14	72
15	84
16	105
17	108
18	120
19	132
20	135
21	156
22	165
23	168
24	195
25	210
26	216
27	240
28	255
29	264
30	270
31	280
32	312
33	330
34	360
35	378
36	384
37	390
38	408
39	420
40	440
41	456
42	462
43	480
44	504
45	510
46	520
47	540
48	546
49	552
50	570
51	600
52	616
53	640
54	660
55	672
56	680
57	690