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A260668 as a simple table

na(n)
01
12
24
37
413
524
645
784
8158
9298
10566
111079
122066
133966
147635
1514730
1628484
1755188
18107130
19208294
20405594
21790812
221543766
233016923
245901858
2511556244
2622647431
2744418613
2887182680
29171234318
30336532357
31661788956
321302124526
332563365624
345048704640

[1,2,4,7,13,24,45,84,158,298,566,1079,2066,3966,
 7635,14730,28484,55188,107130,208294,405594,
 790812,1543766,3016923,5901858,11556244,22647431,
 44418613,87182680,171234318,336532357,661788956,
 1302124526,2563365624,5048704640]