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A278409 as a simple table

na(n)
11
2264
39354
4201539
53576730
658069125
7859516239
811336482734
9132278417831
101373129978107
1112814886712893
12108729955660224
13847319762234831
146118517452942163
1541248241307153636
16261266409367793037

[1,264,9354,201539,3576730,58069125,859516239,
 11336482734,132278417831,1373129978107,
 12814886712893,108729955660224,847319762234831,
 6118517452942163,41248241307153636,
 261266409367793037]