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A081636 as a simple table

na(n)
149681
2109441
3120103
4151561
5198733
6210193
7246241
8255043
9266401
10280243
11295873
12326659
13326701
14347773
15355171
16360421
17368881
18397633
19397673
20423001
21441877
22447137
23471241
24480541
25489989
26499397
27508037
28511507
29532757
30539401

[49681,109441,120103,151561,198733,210193,246241,
 255043,266401,280243,295873,326659,326701,347773,
 355171,360421,368881,397633,397673,423001,441877,
 447137,471241,480541,489989,499397,508037,511507,
 532757,539401]