A222603 - cp's OEIS frontend

A222603 a(1)=1; for n>0, a(n+1) is the least practical number q>a(n) such that 2(a(n)+1)-q is practical.

n	a(n)
1	1
2	2
3	4
4	6
5	8
6	12
7	18
8	20
9	24
10	30
11	32
12	36
13	42
14	54
15	56
16	60
17	66
18	78
19	80
20	84
21	90
22	104
23	120
24	162
25	176
26	192
27	210
28	224
29	234
30	260
31	270
32	272
33	276
34	294
35	320
36	330
37	342
38	378
39	380
40	384
41	390
42	392
43	396
44	414
45	416
46	420
47	450
48	462
49	464
50	468
51	476
52	486
53	510
54	512
55	522
56	546
57	594
58	620
59	630
60	702
61	704
62	714
63	726
64	728
65	744
66	750
67	798
68	800
69	810
70	812
71	816
72	920
73	924
74	930
75	966
76	968
77	972
78	980
79	990
80	992
81	1014
82	1040
83	1050
84	1088
85	1122
86	1232
87	1242
88	1254
89	1280
90	1290
91	1302
92	1316
93	1332
94	1350
95	1352
96	1380
97	1386
98	1458
99	1518
100	1520

[1, 2, 4, 6, 8, 12, 18, 20, 24, 30, 32, 36, 42, 54, 56, 60, 66, 78, 80, 84, 90, 104, 120, 162, 176, 192, 210, 224, 234, 260, 270, 272, 276, 294, 320, 330, 342, 378, 380, 384, 390, 392, 396, 414, 416, 420, 450, 462, 464, 468, 476, 486, 510, 512, 522, 546, 594, 620, 630, 702, 704, 714, 726, 728, 744, 750, 798, 800, 810, 812, 816, 920, 924, 930, 966, 968, 972, 980, 990, 992, 1014, 1040, 1050, 1088, 1122, 1232, 1242, 1254, 1280, 1290, 1302, 1316, 1332, 1350, 1352, 1380, 1386, 1458, 1518, 1520]

cp's OEIS Frontend

A222603 a(1)=1; for n>0, a(n+1) is the least practical number q>a(n) such that 2(a(n)+1)-q is practical.

Table of values

List of values