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A074470 as a simple table

na(n)
12
27
316
431
560
6113
7205
8371
9663
101176
112069
123631
136341
1411039
1519159
1633164
1757287
1898763
19169967
20292061
21501165
22858892
231470334
242514423
254295912
267333264
2712508213
2821319360
2936312685
3061811287
31105152840
32178787270
33303829041
34516074615
35876190239

[2,7,16,31,60,113,205,371,663,1176,2069,3631,6341,
 11039,19159,33164,57287,98763,169967,292061,
 501165,858892,1470334,2514423,4295912,7333264,
 12508213,21319360,36312685,61811287,105152840,
 178787270,303829041,516074615,876190239]