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A296331 as a simple table

na(n)
18
247
3230
41235
56504
634224
7180404
8950451
95007796
1026385348
11139020417
12732477787
133859315404
1420334154462
15107137610499
16564492004530
172974223725585
1815670738828479
1982566773061608
20435031946402290

[8,47,230,1235,6504,34224,180404,950451,5007796,
 26385348,139020417,732477787,3859315404,
 20334154462,107137610499,564492004530,
 2974223725585,15670738828479,82566773061608,
 435031946402290]