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A205256 as a simple table

na(n)
1240
226185
310529929
415472955417
583226275730613
61640204498026982975
7118390237532638666425606
831296002786422594003958101231

[240,26185,10529929,15472955417,83226275730613,
 1640204498026982975,118390237532638666425606,
 31296002786422594003958101231]