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A205058 as a simple table

na(n)
1491
27572
3111413
41383154
516383311
6175923930
71825712439
818040920199
9174834354143
101658203154833
1115589489658454
12145407627330028
131352240865751568
1412547362532350341
15116355015072768773

[491,7572,111413,1383154,16383311,175923930,
 1825712439,18040920199,174834354143,1658203154833,
 15589489658454,145407627330028,1352240865751568,
 12547362532350341,116355015072768773]