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A074371 as a simple table

na(n)
11
21
32
43
56
610
722
840
976
10166
11306
12558
131260
142508
156876
1613596
1731068
1866012
19144636
20298692
21656532
221411650
233114050
246907892
2512800744
2624982760
2751166280
28112488680
29239410280
30501240080
311039913300
322346376556
334608703112
348900121992
3518206157332

[1,1,2,3,6,10,22,40,76,166,306,558,1260,2508,6876,
 13596,31068,66012,144636,298692,656532,1411650,
 3114050,6907892,12800744,24982760,51166280,
 112488680,239410280,501240080,1039913300,
 2346376556,4608703112,8900121992,18206157332]