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A303392 as a simple table

na(n)
01
14
212
352
4156
5612
62028
77892
827324
9107396
10384844
111520436
125566876
1322069796
1481990252
15325707348
161222582268
174862950020
1818395472460
1973233825524
20278700724764
211110232691108
224245596648876
2316920914168148
2464963831455996
25259012955299396

[1,4,12,52,156,612,2028,7892,27324,107396,384844,
 1520436,5566876,22069796,81990252,325707348,
 1222582268,4862950020,18395472460,73233825524,
 278700724764,1110232691108,4245596648876,
 16920914168148,64963831455996,259012955299396]