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A271294 as a simple table

na(n)
01
14
244
3204
4908
53744
615316
761920
8248220
9994992
103980164
1115931876
1263736548
13254959532
141019922416
154079716172

[1,4,44,204,908,3744,15316,61920,248220,994992,
 3980164,15931876,63736548,254959532,1019922416,
 4079716172]