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A268796 as a simple table

na(n)
1240
21714
311948
4117062
51158904
611138352
7104971262
8974000420
98927994302
1081031120788
11729449219322
126521558348746
1357964319359808
14512593621373638
154513059897036336
1639580897460175788
17345946165584055346

[240,1714,11948,117062,1158904,11138352,104971262,
 974000420,8927994302,81031120788,729449219322,
 6521558348746,57964319359808,512593621373638,
 4513059897036336,39580897460175788,
 345946165584055346]