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A260302 as a simple table

na(n)
10
20
3231
41378
54753
612246
726335
850086
987153
10141778
11218791
12323610
13462241
14641278
15867903
161149886
171495585
181913946
192414503
203007378
213703281
224513510
235449951
246525078
257751953
269144226
2710716135
2812482506
2914458753
3016660878
3119105471
3221809710

[0,0,231,1378,4753,12246,26335,50086,87153,141778,
 218791,323610,462241,641278,867903,1149886,
 1495585,1913946,2414503,3007378,3703281,4513510,
 5449951,6525078,7751953,9144226,10716135,12482506,
 14458753,16660878,19105471,21809710]