A186781 - OEIS

A186781 as a simple table

n	a(n)
1	18
2	20
3	30
4	34
5	42
6	69
7	152
8	155
9	259
10	287
11	351
12	459
13	513
14	649
15	671
16	871
17	923
18	949
19	1513
20	1649
21	1717
22	1843
23	1919
24	1957
25	2033
26	2071
27	2147
28	2921
29	3013
30	3151
31	4321
32	4379
33	4553
34	4727
35	4843
36	4867
37	5017
38	5053
39	5177
40	5363
41	5549
42	5611
43	7067
44	7141
45	7289
46	7363
47	7807
48	8651

[18,20,30,34,42,69,152,155,259,287,351,459,513, 649,671,871,923,949,1513,1649,1717,1843,1919,1957, 2033,2071,2147,2921,3013,3151,4321,4379,4553,4727, 4843,4867,5017,5053,5177,5363,5549,5611,7067,7141, 7289,7363,7807,8651]