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A303481 as a simple table

na(n)
10
20
36
412
520
678
742
8152
9234
10250
11110
121080
13156
14518
151500
161456
17272
182988
19342
203880
213612
221342
23506
2410704
253100
261898
277020
289016
29812
3019050
31930
3212640
3312012
343298
3513300
3637476
371332
384142
3918876
4039600
411640
4245822
431806
4428600
4551480
466118

[0,0,6,12,20,78,42,152,234,250,110,1080,156,518,
 1500,1456,272,2988,342,3880,3612,1342,506,10704,
 3100,1898,7020,9016,812,19050,930,12640,12012,
 3298,13300,37476,1332,4142,18876,39600,1640,45822,
 1806,28600,51480,6118]