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A228656 as a simple table

na(n)
13
214
378
4416
52228
611912
763688
8340480
91820208
109730784
1152020448
12278099456
131486709568
147947894912
1542489154688
16227145461760
171214311301888
186491663650304
1934704195603968
20185527355908096
21991822435038208

[3,14,78,416,2228,11912,63688,340480,1820208,
 9730784,52020448,278099456,1486709568,7947894912,
 42489154688,227145461760,1214311301888,
 6491663650304,34704195603968,185527355908096,
 991822435038208]