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A102231 as a simple table

na(n)
00
11
25
332
4236
51896
616116
7142544
81298524
912100952
10114820964
111105574400
1210775285836
13106098789832
141053858546516
1510546951101360
16106249238782652
171076554249491640
1810964085715303620
19112175072002688480

[0,1,5,32,236,1896,16116,142544,1298524,12100952,
 114820964,1105574400,10775285836,106098789832,
 1053858546516,10546951101360,106249238782652,
 1076554249491640,10964085715303620,
 112175072002688480]