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A003499 as a simple table

na(n)
02
16
234
3198
41154
56726
639202
7228486
81331714
97761798
1045239074
11263672646
121536796802
138957108166
1452205852194
15304278004998
161773462177794
1710336495061766
1860245508192802
19351136554095046
202046573816377474
2111928306344169798
2269523264248641314

[2,6,34,198,1154,6726,39202,228486,1331714,
 7761798,45239074,263672646,1536796802,8957108166,
 52205852194,304278004998,1773462177794,
 10336495061766,60245508192802,351136554095046,
 2046573816377474,11928306344169798,
 69523264248641314]