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A147775 as a simple table

na(n)
1420
2840
3858
41260
51326
61540
71716
81938
91980
102145
112310
122340
132520
142622
152652
162730
172850
182860
192964
203080
213450
223465
233740
243876
253960
264002
274080
284290
294350
304420
314560
324620
334650
344692
354845
364940
375005
385100
395244
405394
415460
425544

[420,840,858,1260,1326,1540,1716,1938,1980,2145,
 2310,2340,2520,2622,2652,2730,2850,2860,2964,3080,
 3450,3465,3740,3876,3960,4002,4080,4290,4350,4420,
 4560,4620,4650,4692,4845,4940,5005,5100,5244,5394,
 5460,5544]