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A249292 as a simple table

na(n)
126
2168
3660
42228
55646
612600
725280
846608
980334
10131672
11206112
12311352
13455954
14649920
15904884
161235024
171654734
182181960
192836016
203638460
214613010
225786924
237188012
248848968
2510803998
2613090368
2715748356
2818822884
2922359246

[26,168,660,2228,5646,12600,25280,46608,80334,
 131672,206112,311352,455954,649920,904884,1235024,
 1654734,2181960,2836016,3638460,4613010,5786924,
 7188012,8848968,10803998,13090368,15748356,
 18822884,22359246]