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A278131 as a simple table

na(n)
0318
1909
22091
34455
49183
518639
637551
775375
8151023
9302319
10604911
111210095
122420463
134841199
149682671
1519365615
1638731503
1777463279
18154926831
19309853935
20619708143
211239416559
222478833391
234957667055
249915334383
2519830669039
2639661338351

[318,909,2091,4455,9183,18639,37551,75375,151023,
 302319,604911,1210095,2420463,4841199,9682671,
 19365615,38731503,77463279,154926831,309853935,
 619708143,1239416559,2478833391,4957667055,
 9915334383,19830669039,39661338351]