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A277653 as a simple table

na(n)
10
20
31
42
58
628
798
8346
91218
104290
1115110
1253218
13187438
14660170
152325166
168189402
1728843662
18101589450
19357805342
201260216122
214438571726
2215632968522
2355060438334
24193926819802
25683024192622
262405660280426
278472908349854

[0,0,1,2,8,28,98,346,1218,4290,15110,53218,187438,
 660170,2325166,8189402,28843662,101589450,
 357805342,1260216122,4438571726,15632968522,
 55060438334,193926819802,683024192622,
 2405660280426,8472908349854]