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A107278 as a simple table

na(n)
61
74
817
960
10209
11685
122204
136913
1421387
1565241
16197104
17590284
181755804
195191723
2015276610
2144761350
22130682371
23380337474
241103927291
253196494453

[1,4,17,60,209,685,2204,6913,21387,65241,197104,
 590284,1755804,5191723,15276610,44761350,
 130682371,380337474,1103927291,3196494453]