A286906 - cp's OEIS frontend

A286906 Unitary phi-practical numbers: numbers k such that each m < k is a sum of a subset of {uphi(d) : d | k, gcd(d,k/d)=1}, where uphi is the unitary totient function (A047994).

n	a(n)
1	1
2	2
3	3
4	6
5	12
6	15
7	30
8	42
9	60
10	84
11	105
12	120
13	132
14	156
15	165
16	195
17	210
18	240
19	255
20	330
21	390
22	420
23	462
24	510
25	546
26	570
27	660
28	690
29	714
30	780
31	798
32	840
33	870
34	924
35	930
36	966
37	1020
38	1050
39	1092
40	1140
41	1155
42	1218
43	1302
44	1320
45	1365
46	1380
47	1428
48	1554
49	1560
50	1596
51	1680

[1, 2, 3, 6, 12, 15, 30, 42, 60, 84, 105, 120, 132, 156, 165, 195, 210, 240, 255, 330, 390, 420, 462, 510, 546, 570, 660, 690, 714, 780, 798, 840, 870, 924, 930, 966, 1020, 1050, 1092, 1140, 1155, 1218, 1302, 1320, 1365, 1380, 1428, 1554, 1560, 1596, 1680]

cp's OEIS Frontend

A286906 Unitary phi-practical numbers: numbers k such that each m < k is a sum of a subset of {uphi(d) : d | k, gcd(d,k/d)=1}, where uphi is the unitary totient function (A047994).

Table of values

List of values