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A250786 as a simple table

na(n)
172
2196
3482
41152
52640
65882
712796
827344
957610
10120060
11248072
12509158
131039532
142113580
154283210
168657344
1717462056
1835162842
1970712260
20142050352
21285113682
22571866796
231146386672
242297066582
254601080260
269213401692

[72,196,482,1152,2640,5882,12796,27344,57610,
 120060,248072,509158,1039532,2113580,4283210,
 8657344,17462056,35162842,70712260,142050352,
 285113682,571866796,1146386672,2297066582,
 4601080260,9213401692]