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A231249 as a simple table

na(n)
10
220
3552
45992
576264
61081934
715270416
8213355654
92979297186
1041637993524
11582001470148
128134516660856
13113692450572670
141589033640398564
1522209327313491742
16310411398997352946
174338502347339782972

[0,20,552,5992,76264,1081934,15270416,213355654,
 2979297186,41637993524,582001470148,8134516660856,
 113692450572670,1589033640398564,
 22209327313491742,310411398997352946,
 4338502347339782972]