A156840 - OEIS

A156840 as a simple table

n	a(n)
0	1
1	199
2	251
3	449
4	451
5	649
6	701
7	899
8	901
9	1099
10	1151
11	1349
12	1351
13	1549
14	1601
15	1799
16	1801
17	1999
18	2051
19	2249
20	2251
21	2449
22	2501
23	2699
24	2701
25	2899
26	2951
27	3149
28	3151
29	3349
30	3401
31	3599
32	3601
33	3799
34	3851
35	4049
36	4051
37	4249
38	4301
39	4499
40	4501
41	4699
42	4751
43	4949
44	4951

[1,199,251,449,451,649,701,899,901,1099,1151,1349, 1351,1549,1601,1799,1801,1999,2051,2249,2251,2449, 2501,2699,2701,2899,2951,3149,3151,3349,3401,3599, 3601,3799,3851,4049,4051,4249,4301,4499,4501,4699, 4751,4949,4951]

[1,199,251,449,451,649,701,899,901,1099,1151,1349,
 1351,1549,1601,1799,1801,1999,2051,2249,2251,2449,
 2501,2699,2701,2899,2951,3149,3151,3349,3401,3599,
 3601,3799,3851,4049,4051,4249,4301,4499,4501,4699,
 4751,4949,4951]