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A197540 as a simple table

na(n)
12
28
311
424
561
6121
7270
8614
91296
102973
116574
1214527
1332621
1472032
15160402
16357304
17792903
181765982
193926185
208727963
2119420018
2243174998
2396024756
24213571465
25474912978
261056243677
272348975193
285223841988
2911617743070
3025836617638

[2,8,11,24,61,121,270,614,1296,2973,6574,14527,
 32621,72032,160402,357304,792903,1765982,3926185,
 8727963,19420018,43174998,96024756,213571465,
 474912978,1056243677,2348975193,5223841988,
 11617743070,25836617638]