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A246738 as a simple table

na(n)
12
212
3124
4424
51566
63876
79368
818768
936250
1063100
11106452
12168312
13259574
14383124
15554416
16777376
171072818
181445868
191923500
202512200
213245902
224132612
235214024
246499824
258040266
269846876
2711979268
2814450968
2917331750
3020637300

[2,12,124,424,1566,3876,9368,18768,36250,63100,
 106452,168312,259574,383124,554416,777376,1072818,
 1445868,1923500,2512200,3245902,4132612,5214024,
 6499824,8040266,9846876,11979268,14450968,
 17331750,20637300]